At the A1 level, you only need to know that der Fluss means 'the river'. You should focus on the basic gender (masculine) and how to use it with simple verbs like 'ist' or 'sehen'. You will mostly see it in the nominative case ('Der Fluss ist groß') or the accusative case ('Ich sehe den Fluss'). At this stage, don't worry too much about complex prepositions. Just remember that many German cities have a river and that it is a common place for people to relax. You might also learn the word in the context of colors, such as 'Das Wasser im Fluss ist blau'. Learning that 'Fluss' relates to 'Wasser' is the most important connection to make. Practice saying 'der Fluss' to get the short 'u' sound right. It's a very common word in beginner textbooks because it's part of describing a landscape or a city. You should also be able to recognize it in simple questions like 'Wo ist der Fluss?' (Where is the river?).
At the A2 level, you begin to use der Fluss with more variety, especially with prepositions that describe location and direction. You should learn the difference between 'am Fluss' (at the river) and 'an den Fluss' (to the river). This is a great way to practice the two-way prepositions (Wechselpräpositionen). You will also start using the plural form, die Flüsse. You might talk about your hobbies, such as 'Ich gehe am Fluss joggen' or 'Wir machen ein Picknick am Fluss'. You should also be able to use basic adjectives to describe a river, like 'breit', 'schmal', or 'schön'. At this level, you might also encounter compound nouns like 'Flussufer' (riverbank). Understanding that 'Fluss' is masculine will help you correctly decline any adjectives that come before it, such as 'ein langer Fluss'. You are moving beyond simple identification to describing activities and locations related to rivers.
At the B1 level, your use of der Fluss becomes more descriptive and grammatically complex. You should be comfortable using the genitive case, such as 'das Ufer des Flusses' (the bank of the river). You will also start to use the word in the context of environmental discussions, which are common at this level. You might talk about 'Flussverschmutzung' (river pollution) or the 'Schutz der Flüsse' (protection of the rivers). You can describe more specific features, like the 'Strömung' (current) or the 'Wasserspiegel' (water level). In terms of sentence structure, you might use relative clauses: 'Der Fluss, der durch meine Stadt fließt, ist sehr sauber.' You will also encounter the word in more metaphorical senses, like 'der Redefluss' (flow of speech). At B1, you are expected to handle more nuanced vocabulary and talk about the importance of rivers for transport, energy, and the ecosystem.
At the B2 level, der Fluss is used in more abstract and professional contexts. You will hear it in news reports about 'Hochwasserschutz' (flood protection) or 'Binnenschifffahrt' (inland navigation). You should be able to discuss the economic importance of rivers as trade routes and their role in the industrial history of Germany. Metaphorical uses become more common, such as 'alles ist im Fluss' (everything is in flux/moving) or 'der Informationsfluss' (flow of information). You will also learn more specific synonyms and related terms like 'Strom' (for large rivers) or 'Gewässer' (for bodies of water in general). Your grammatical precision should be high, correctly using cases and adjective endings in complex sentences. You might also encounter the word in literary texts where the river symbolizes time, change, or life itself. At this level, you can express detailed opinions about water management and environmental policies related to rivers.
At the C1 level, you explore the most sophisticated and nuanced uses of der Fluss. This includes technical language in fields like hydrology, ecology, and logistics. You might discuss 'Flussbegradigung' (river straightening) and its ecological consequences, using advanced vocabulary and complex syntax. The metaphorical use of 'flow' in psychology (the 'Flow-Erlebnis') or philosophy (Heraclitus' 'Panta Rhei') is a topic you should be able to handle. You will recognize the word in idiomatic expressions and proverbs, understanding their cultural weight. Your writing should reflect a high degree of stylistic variety, using 'Fluss' alongside its synonyms to avoid repetition. You can analyze how the imagery of the river is used in German Romanticism or modern literature. At C1, the word is no longer just a geographical term but a versatile concept that you can apply to various intellectual and professional domains with ease.
At the C2 level, your mastery of der Fluss is near-native. You understand all its subtle connotations, from the most archaic poetic uses to the most cutting-edge technical applications. You can engage in high-level debates about the geopolitical importance of international rivers or the complex legalities of water rights. You are familiar with rare compound words and can use them correctly in academic or professional writing. Your understanding of the word's etymology and its relationship to other Germanic languages adds depth to your linguistic knowledge. You can appreciate and produce complex metaphors involving 'Fluss' in creative writing. Whether it's a technical manual about 'Durchflussmengen' (flow rates) or a philosophical treatise on the 'Fluss der Zeit' (flow of time), you navigate the vocabulary with total confidence and precision. You are sensitive to the register and tone, choosing the perfect synonym or related term for any given context.

Fluss in 30 Seconds

  • Der Fluss is a masculine noun meaning 'river'. It refers to a natural flowing body of water, often central to geography and city planning.
  • Grammatically, it is 'der Fluss' with the plural 'die Flüsse'. It changes its article based on the four German cases (der, den, dem, des).
  • Beyond water, it can metaphorically mean 'flow', such as in speech (Redefluss) or information (Informationsfluss), or the state of being in 'flux'.
  • Common prepositions used with it are 'am' (location: by the river) and 'an den' (direction: to the river), following two-way preposition rules.

The German word der Fluss is a fundamental noun that translates primarily to 'the river' in English. At its most basic level, it refers to a natural, large, flowing body of water that usually empties into a sea, a lake, or another river. In the German language, the concept of a river is deeply embedded in both geography and culture, given that Germany is defined by its major waterways like the Rhine (Rhein), the Danube (Donau), and the Elbe. However, the word Fluss is not just a geographical term; it also encompasses the abstract concept of 'flow' or 'flux.' When you speak about the flow of a conversation, the flow of traffic, or even the flow of electricity in certain technical contexts, you are touching upon the same root meaning. Understanding Fluss requires recognizing its masculine gender (der) and its plural form (die Flüsse), which involves a vowel change (Umlaut) and an ending change. In daily life, Germans use this word when planning hikes, discussing environmental issues, or describing the layout of a city. For example, many German cities are defined by the river they sit on, such as Frankfurt am Main or Köln am Rhein. This prepositional usage 'am' (an dem) is a key grammatical structure you will encounter frequently.

Geographical Context
Used to describe a significant stream of water. In Germany, rivers are categorized by size, where a Fluss is larger than a Bach (brook/creek) but might be smaller than a Strom (a very large, internationally significant river).
Abstract Context
Refers to the continuous movement of something. For instance, der Redefluss refers to someone's flow of speech or talkativeness. In psychology, the 'flow' state is often translated or described using this term.

Der Fluss fließt ruhig durch das grüne Tal und bietet Lebensraum für viele Tiere.

When using Fluss, it is essential to consider the state of the water. Is it a reißender Fluss (a torrential river) or a ruhiger Fluss (a calm river)? The word is also central to many compound nouns in German, which is a hallmark of the language's structure. You might hear about the Flussufer (riverbank), the Flussbett (riverbed), or the Flussmündung (river mouth/estuary). Each of these terms builds upon the base word to provide specific spatial information. Furthermore, the word appears in discussions about logistics and transport, as rivers have historically been the most important trade routes in Central Europe. If you are traveling through Germany, Austria, or Switzerland, you will inevitably find yourself walking along a Fluss, crossing one on a bridge, or perhaps even taking a boat tour. The word is versatile, appearing in literature to symbolize the passage of time or the inevitability of change, much like the famous Greek saying 'everything flows' (Panta Rhei), which in German is often discussed in the context of alles ist im Fluss.

Wir machen am Wochenende ein Picknick am Fluss.

Metaphorical Usage
In creative writing, 'der Fluss des Lebens' (the river of life) is a common trope used to describe the journey from birth to death.

Nach dem Regen war der Fluss sehr trüb und führte Hochwasser.

In summary, Fluss is a word you will use from day one of your German learning journey. Whether you are describing a landscape, discussing environmental protection (der Umweltschutz am Fluss), or using it as a metaphor for progress, its utility is vast. It connects the physical world of water and geography with the abstract world of movement and continuity. As you progress to higher CEFR levels, you will find Fluss appearing in more complex grammatical constructions and specialized vocabulary, but its core identity as a moving body of water remains the anchor for all its meanings.

Die Schiffe auf dem Fluss transportieren Waren in die ganze Welt.

An dieser Stelle ist der Fluss besonders breit und tief.

Using der Fluss correctly in German sentences requires an understanding of both its grammatical gender and the various cases it can take depending on the preposition used. Since it is a masculine noun, its articles change: der Fluss (nominative), den Fluss (accusative), dem Fluss (dative), and des Flusses (genitive). One of the most common challenges for English speakers is the distinction between location and direction when using prepositions like an, in, or über. If you are standing by the river, you use the dative: Ich stehe am Fluss (am = an dem). If you are moving toward the river to stand by it, you use the accusative: Ich gehe an den Fluss. This distinction is vital for clear communication in German.

Nominative Case
The river is the subject. Example: Der Fluss ist heute sehr kalt. (The river is very cold today.)
Accusative Case
The river is the direct object or the goal of movement. Example: Wir überqueren den Fluss mit einer Fähre. (We cross the river with a ferry.)

Können wir heute Abend den Fluss entlang spazieren gehen?

When discussing the plural, die Flüsse, the same case rules apply. For instance, 'Germany has many rivers' would be Deutschland hat viele Flüsse (accusative plural). If you are talking about something located between two rivers, you would say zwischen den Flüssen (dative plural). Verbs commonly associated with Fluss include fließen (to flow), münden (to lead into/empty into), überqueren (to cross), and anschwellen (to swell/rise). For example, Der Fluss fließt in die Nordsee (The river flows into the North Sea). Notice how the direction into the sea requires the accusative case for die Nordsee as well.

Das Wasser des Flusses ist kristallklar und sehr sauber.

Dative Case
Used for location. Example: In dem Fluss schwimmen viele Fische. (In the river many fish are swimming.)

Hinter dem Haus gibt es einen kleinen Fluss, der leise plätschert.

Adjectives also play a huge role in describing a Fluss. You can use breit (wide), schmal (narrow), tief (deep), seicht (shallow), sauber (clean), or verschmutzt (polluted). When combined with the noun, remember to apply the correct adjective endings: ein breiter Fluss, der tiefe Fluss, den schmutzigen Fluss. These nuances allow you to paint a vivid picture of the landscape you are describing. In more advanced contexts, you might describe the Strömung (current) of the river: Der Fluss hat eine starke Strömung. This combination of nouns and adjectives is essential for reaching B1 and B2 levels of proficiency, where descriptive language becomes more important.

Die Kinder werfen Steine in den Fluss und schauen den Wellen zu.

Früher war dieser Fluss die Grenze zwischen zwei Ländern.

In Germany, you will hear the word Fluss in a variety of real-world contexts, ranging from the mundane to the highly technical. Perhaps the most frequent place is in the news, specifically during weather reports or environmental segments. When there is heavy rain, news anchors will talk about steigende Flusspegel (rising river levels) and the danger of Hochwasser (flooding). Conversely, during a hot summer, you will hear about niedrige Wasserstände (low water levels) affecting shipping on the Fluss. Navigation and logistics are massive industries in Germany, and the Binnenschifffahrt (inland navigation) relies entirely on the health and navigability of the country's rivers. Captains and logistics experts constantly monitor the Fahrrinne (shipping channel) of the Fluss.

Travel and Tourism
Tour guides often say things like: 'Auf der linken Seite sehen Sie den Fluss...' or 'Diese Stadt ist berühmt für ihren Fluss.' River cruises (Flusskreuzfahrten) are also a very popular tourist activity in Germany.
Daily Conversation
Locals might suggest meeting 'am Fluss' for a walk or a beer. In many cities, the riverbank is the social heart of the community, especially in summer.

Der Kapitän steuert das Schiff sicher durch den kurvigen Fluss.

In academic and professional settings, Fluss is used to describe the movement of data or energy. An engineer might talk about Stromfluss (current flow), while a logistics manager discusses Warenfluss (flow of goods) or Informationsfluss (flow of information). In these cases, the word retains its core meaning of continuous, directed movement but applies it to non-liquid entities. If you are working in a German office, you might hear your boss say, 'Wir müssen den Informationsfluss verbessern' (We need to improve the flow of information). This shows how the word transitions from a simple noun for water into a sophisticated tool for organizational theory. Similarly, in psychology or productivity coaching, the state of being 'in the zone' is often described as being im Fluss.

Wegen der Dürre ist der Fluss an vielen Stellen fast ausgetrocknet.

Environmental Science
Scientists monitor the 'Flussökologie' (river ecology) to ensure that the water quality is sufficient for fish and plants.

Der Fluss dient als natürliche Kühlung für das nahegelegene Kraftwerk.

Literature and music are other places where you will encounter Fluss. Many German poems use the river as a metaphor for the soul or the passage of time. Songs might mention the 'rauschender Fluss' (rustling/rushing river) to evoke a sense of nature and romanticism. If you listen to German podcasts or watch German films, you'll notice that the river is often a setting for pivotal moments—meetings on bridges, clandestine conversations on the banks, or journeys toward a new life. Understanding the word in these varied contexts will help you appreciate the depth of the German language beyond just its literal definitions.

Die Brücke über den Fluss ist über hundert Jahre alt.

Es ist verboten, Abfälle direkt in den Fluss zu leiten.

One of the most frequent mistakes English speakers make when learning der Fluss is getting the grammatical gender wrong. Many learners assume that because water (das Wasser) is neuter, the word for river should be as well. However, Fluss is strictly masculine. Saying 'das Fluss' is a common error that marks you as a beginner. Another mistake involves the plural form. While many German nouns simply add an '-e' or '-en', Fluss requires an Umlaut: die Flüsse. Forgetting the dots over the 'u' changes the pronunciation and is grammatically incorrect. Furthermore, learners often confuse Fluss with Flüssigkeit. While Fluss is a river or a flow, Flüssigkeit is the general word for 'liquid' or 'fluid'. You wouldn't say 'Ich trinke einen Fluss' if you meant you were drinking a liquid.

Confusion with 'Bach' and 'Strom'
Learners often use 'Fluss' for any body of flowing water. However, a small creek in the woods is a Bach. Conversely, a massive river like the Amazon or the deep Rhine is often called a Strom. Using 'Fluss' for a tiny trickle of water sounds unnatural to native speakers.
Prepositional Errors
Mistaking 'am Fluss' for 'im Fluss'. 'Am Fluss' means you are next to it (at the bank), while 'im Fluss' means you are literally inside the water (swimming or sinking). Using the wrong one can lead to funny or confusing situations.

Falsch: Ich schwimme am Fluss. (Richtig: Ich schwimme im Fluss.)

Another tricky area is the use of 'nach' versus 'zu' or 'an'. If you want to say you are going to the river, you should say Ich gehe zum Fluss or Ich gehe an den Fluss. Using 'nach' is incorrect because 'nach' is generally used for cities, countries, or the direction 'home' (nach Hause). Additionally, the genitive case of Fluss is des Flusses. Many learners forget to add the '-es' ending to the noun itself when using the genitive. For example, 'the water of the river' is das Wasser des Flusses, not 'das Wasser des Fluss'. While the genitive is becoming less common in spoken German (often replaced by 'von' + dative), it is still essential for formal writing and exams.

Falsch: Die Flusse in Deutschland sind sauber. (Richtig: Die Flüsse...)

Spelling Error
Some learners write 'Flus' with only one 's'. In German, a short vowel (like the 'u' in Fluss) is usually followed by a double consonant. Therefore, the 'ss' is mandatory.

Vermeiden Sie es, Fluss mit Floß (raft) zu verwechseln.

Finally, be careful with the word Floß (raft). It looks very similar to Fluss but means something entirely different. A Floß is a simple boat made of logs, while a Fluss is the water itself. Mixing these up can lead to confusing sentences like 'Ich schwimme auf dem Fluss' (correct) versus 'Ich schwimme auf dem Floß' (also correct, but means you are on a raft). Pay close attention to the vowel sounds to keep these two distinct in your mind. By being mindful of these common pitfalls, you will speak much more accurately and sound more like a native speaker.

Der Fluss hat eine so starke Strömung, dass man dort nicht schwimmen sollte.

Das Flusswasser wird in dieser Anlage gereinigt und als Trinkwasser genutzt.

While Fluss is the standard word for river, German offers a rich palette of synonyms and related terms that can add precision to your descriptions. Depending on the size, speed, and function of the body of water, you might choose a different word. For instance, der Strom is often used for very large rivers that flow into the sea, like the Amazon or the Nile. In a technical or poetic sense, Strom also implies a massive volume of water. On the other end of the spectrum is der Bach, which refers to a small stream or brook. If you can jump across it, it's definitely a Bach, not a Fluss. Between a Bach and a Fluss, you might find a Bächlein (a little brook) or a Wasserlauf (watercourse).

Fluss vs. Strom
A Fluss is the general term. A Strom is specifically a large river that reaches the ocean. Note: Strom also means electricity!
Fluss vs. Kanal
A Fluss is natural. A Kanal (canal) is man-made, usually built for shipping or irrigation. They look similar, but their origins are different.

Der kleine Bach im Wald mündet später in einen großen Fluss.

In more formal or scientific contexts, you might encounter the term das Fließgewässer. This is a collective noun for all types of flowing water, from the smallest trickle to the largest river. It is used in ecology and water management. If you are talking about the water itself as a substance in motion, you might use die Strömung (the current). For example, 'The river has a strong current' would be Der Fluss hat eine starke Strömung. Another alternative in a poetic or dramatic context is die Flut (the flood or the tide), though this usually refers specifically to rising water or the ocean's tide. Understanding these distinctions helps you avoid using Fluss as a 'catch-all' word and allows you to be more descriptive.

Anstatt des natürlichen Flusses nutzt die Industrie oft künstliche Kanäle.

Fluss vs. Gewässer
Gewässer is a very broad term meaning 'body of water'. It can be a lake, a river, or a sea. Use this in official or scientific reports.

Die Strömung in diesem Fluss ist lebensgefährlich für Schwimmer.

When describing the movement of people or things, you can use der Strom as well. For example, ein Besucherstrom (a stream of visitors) or ein Flüchtlingsstrom (a flow of refugees). In these cases, Fluss would sound slightly less natural than Strom, as Strom conveys a greater sense of power and volume. However, for the flow of a liquid in a pipe, you would use der Durchfluss. As you can see, while Fluss is the foundational word, the German language provides many specific alternatives that allow you to fine-tune your meaning based on the context, scale, and nature of the 'flow' you are describing.

In der Wüste gibt es kaum einen permanenten Fluss, meist nur Wadis.

Der Rhein ist der wasserreichste Fluss Deutschlands.

How Formal Is It?

Formal

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Neutral

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Informal

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Child friendly

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Slang

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Fun Fact

The root 'flu-' is found in many European languages (Latin 'fluere'), which is why 'fluent', 'fluid', and 'Fluss' all sound somewhat related.

Pronunciation Guide

UK /flʊs/
US /flʊs/
Single syllable, equal stress on the vowel and consonant cluster.
Rhymes With
Kuss (kiss) Muss (must) Nuss (nut) Schluss (end) Genuss (enjoyment) Stuss (nonsense) Guss (cast/pouring) Überfluss (abundance)
Common Errors
  • Pronouncing 'u' like the 'u' in 'bus' (English short a sound).
  • Pronouncing 'ss' as a voiced 'z' sound.
  • Drawing out the 'u' too long (like 'fluuuuss').
  • Confusing it with 'Floß' (which has a long 'o').
  • Swapping the 'f' for a 'v' sound.

Difficulty Rating

Reading 1/5

Very easy to recognize in texts due to its frequency.

Writing 2/5

The plural 'Flüsse' and genitive 'Flusses' require attention.

Speaking 2/5

Short 'u' sound can be tricky for English speakers.

Listening 1/5

Distinctive sound, hard to confuse with other common words.

What to Learn Next

Prerequisites

Wasser blau groß fließen Stadt

Learn Next

Ufer Brücke Strömung Mündung Schiff

Advanced

Hydrologie Binnenschifffahrt Ökosystem Sedimenttransport Renaturierung

Grammar to Know

Two-Way Prepositions (Wechselpräpositionen)

Ich gehe an den Fluss (Accusative/Direction) vs. Ich bin am Fluss (Dative/Location).

Masculine Noun Declension

Der Fluss (Nom), den Fluss (Acc), dem Fluss (Dat), des Flusses (Gen).

Plural with Umlaut

Der Fluss -> Die Flüsse (U changes to Ü).

Compound Noun Formation

Fluss + Ufer = das Flussufer (The gender comes from the last word: das Ufer).

Genitive ending -es

Nouns ending in 's' sounds like 'ss' add '-es' in genitive: des Flusses.

Examples by Level

1

Der Fluss ist blau.

The river is blue.

Nominative masculine singular.

2

Ich sehe einen Fluss.

I see a river.

Accusative masculine singular (einen).

3

Wo ist der Fluss?

Where is the river?

Question with 'wo' and nominative.

4

Das Wasser im Fluss ist kalt.

The water in the river is cold.

Dative after 'in' (im = in dem).

5

Der Fluss ist sehr lang.

The river is very long.

Simple adjective use.

6

Hier ist ein Fluss.

Here is a river.

Introductory 'hier ist' with nominative.

7

Mein Haus ist am Fluss.

My house is by the river.

Dative after 'an' (am = an dem) for location.

8

Der Fluss fließt.

The river flows.

Subject-verb agreement (3rd person singular).

1

Wir gehen heute am Fluss spazieren.

We are going for a walk by the river today.

Dative 'am' for location of activity.

2

Kannst du über den Fluss schwimmen?

Can you swim across the river?

Accusative 'über' for movement across.

3

Die Brücke führt über den Fluss.

The bridge leads across the river.

Accusative 'über' for spanning/direction.

4

Es gibt viele Fische in diesem Fluss.

There are many fish in this river.

Dative 'in diesem' for location.

5

Die Kinder spielen am Flussufer.

The children are playing on the riverbank.

Compound noun: Fluss + Ufer.

6

Dieser Fluss ist breiter als der andere.

This river is wider than the other one.

Comparative adjective 'breiter'.

7

Wir fahren mit dem Boot auf dem Fluss.

We are going by boat on the river.

Dative 'auf dem' for location on a surface.

8

An den Flüssen liegen oft große Städte.

Large cities are often located on rivers.

Dative plural 'den Flüssen'.

1

Der Schutz unserer Flüsse ist sehr wichtig für die Umwelt.

The protection of our rivers is very important for the environment.

Genitive plural 'unserer Flüsse'.

2

Wegen des starken Regens ist der Fluss über die Ufer getreten.

Because of the heavy rain, the river has burst its banks.

Genitive 'des starken Regens' and idiom 'über die Ufer treten'.

3

Die Strömung im Fluss ist nach dem Sturm sehr gefährlich.

The current in the river is very dangerous after the storm.

Noun 'Strömung' related to Fluss.

4

Früher wurde der Fluss für den Transport von Holz genutzt.

In the past, the river was used for transporting wood.

Passive voice 'wurde genutzt'.

5

Wir müssen verhindern, dass Chemikalien in den Fluss gelangen.

We must prevent chemicals from getting into the river.

Accusative 'in den Fluss' for movement into.

6

Der Fluss mündet nach 200 Kilometern in den See.

The river empties into the lake after 200 kilometers.

Verb 'münden' with 'in' + accusative.

7

Entlang des Flusses gibt es einen wunderschönen Radweg.

Along the river, there is a beautiful bicycle path.

Genitive 'des Flusses' after 'entlang'.

8

Der Fluss trennt die Altstadt von der Neustadt.

The river separates the old town from the new town.

Verb 'trennen' (separates).

1

Die Binnenschifffahrt auf diesem Fluss hat eine lange Tradition.

Inland navigation on this river has a long tradition.

Complex compound 'Binnenschifffahrt'.

2

Man sollte nicht gegen den Strom schwimmen, wenn der Fluss so reißend ist.

One should not swim against the current when the river is so torrential.

Idiomatic use of 'Strom' and adjective 'reißend'.

3

Die Wasserqualität des Flusses hat sich in den letzten Jahren verbessert.

The water quality of the river has improved in recent years.

Genitive 'des Flusses' and reflexive 'hat sich verbessert'.

4

Ein ständiger Informationsfluss ist für den Erfolg des Projekts entscheidend.

A constant flow of information is crucial for the success of the project.

Metaphorical use of 'Fluss'.

5

Die Staumauer reguliert den Fluss des Wassers im Tal.

The dam regulates the flow of water in the valley.

Verb 'regulieren' and 'Fluss' as 'flow'.

6

Durch die Begradigung des Flusses wurden viele Lebensräume zerstört.

Due to the straightening of the river, many habitats were destroyed.

Noun 'Begradigung' (straightening).

7

In der Philosophie bedeutet 'Panta Rhei', dass alles im Fluss ist.

In philosophy, 'Panta Rhei' means that everything is in flux.

Philosophical idiom 'im Fluss sein'.

8

Der Fluss dient als natürliche Grenze zwischen den beiden Bundesländern.

The river serves as a natural border between the two federal states.

Verb 'dienen als' (serves as).

1

Die Renaturierung der Flüsse ist ein Mammutprojekt für den Naturschutz.

The restoration of rivers is a mammoth project for nature conservation.

Advanced noun 'Renaturierung'.

2

Sein Redefluss war kaum zu bremsen, als er von seiner Reise erzählte.

His flow of speech was hard to stop when he told about his trip.

Compound 'Redefluss'.

3

Das Ökosystem des Flusses reagiert empfindlich auf Temperaturschwankungen.

The river's ecosystem reacts sensitively to temperature fluctuations.

Scientific context with 'empfindlich'.

4

Historisch gesehen waren Flüsse die Lebensadern der industriellen Entwicklung.

Historically speaking, rivers were the lifelines of industrial development.

Metaphor 'Lebensadern' (lifelines).

5

Die Sedimentschichten im Flussbett geben Aufschluss über die Erdgeschichte.

The sediment layers in the riverbed provide information about Earth's history.

Technical term 'Sedimentschichten'.

6

Trotz der Dürre konnte ein minimaler Durchfluss im Fluss aufrechterhalten werden.

Despite the drought, a minimum flow rate in the river could be maintained.

Noun 'Durchfluss' (flow rate).

7

Die Lyrik der Romantik thematisiert oft den Fluss als Spiegel der Seele.

Romantic poetry often themes the river as a mirror of the soul.

Literary analysis vocabulary.

8

Es ist schwierig, den Fluss der Zeit in Worte zu fassen.

It is difficult to put the flow of time into words.

Abstract metaphor 'Fluss der Zeit'.

1

Die hydrodynamischen Eigenschaften des Flusses wurden akribisch untersucht.

The hydrodynamic properties of the river were meticulously investigated.

Highly technical adjective 'hydrodynamisch'.

2

In seinem Werk verschmelzen Realität und Fiktion zu einem unaufhaltsamen Fluss.

In his work, reality and fiction merge into an unstoppable flow.

Abstract literary metaphor.

3

Die völkerrechtliche Regelung der Nutzung grenzüberschreitender Flüsse ist komplex.

The international legal regulation of the use of transboundary rivers is complex.

Legal/Political terminology 'völkerrechtlich'.

4

Der Fluss der Argumentation in seiner Dissertation war bestechend logisch.

The flow of argumentation in his dissertation was impressively logical.

Metaphorical use in academia.

5

Durch anthropogene Eingriffe wurde das natürliche Gleichgewicht des Flusses gestört.

Through anthropogenic interventions, the natural balance of the river was disturbed.

Scientific term 'anthropogen'.

6

Die kaskadenartige Abfolge von Nebenflüssen speist den gewaltigen Strom.

The cascade-like sequence of tributaries feeds the mighty river.

Sophisticated vocabulary 'kaskadenartig', 'speisen'.

7

Man kann nicht zweimal in denselben Fluss steigen, so die antike Weisheit.

One cannot step into the same river twice, according to ancient wisdom.

Classical philosophical reference.

8

Die Ästhetik des Fließens wird in dieser Skulptur perfekt verkörpert.

The aesthetics of flowing is perfectly embodied in this sculpture.

Art criticism vocabulary.

Common Collocations

breiter Fluss
reißender Fluss
den Fluss überqueren
im Fluss sein
trüber Fluss
Fluss aufwärts
Fluss abwärts
sauberer Fluss
den Fluss stauen
tiefes Flussbett

Common Phrases

Am Fluss entlang

— Moving parallel to the river. Often used for walking or cycling routes.

Wir spazieren gerne am Fluss entlang.

Über den Fluss

— From one side to the other. Used with verbs of movement.

Die Fähre bringt uns über den Fluss.

Im Fluss der Zeit

— As time goes by. A poetic way to describe history or aging.

Vieles verändert sich im Fluss der Zeit.

Ein trockener Fluss

— A riverbed without water. Usually due to drought.

Im Sommer war es nur noch ein trockener Fluss.

Den Fluss regulieren

— To control a river's flow through engineering.

Die Regierung will den Fluss regulieren.

Vom Fluss leben

— To depend on the river for food or income.

Die Fischer in diesem Dorf leben vom Fluss.

An einem Fluss liegen

— To be situated on the banks of a river.

Wien liegt an einem großen Fluss, der Donau.

In den Fluss springen

— To jump into the water. Implies intentional movement.

An heißen Tagen springen wir in den Fluss.

Den Fluss verschmutzen

— To pollute the river water.

Industrieabfälle dürfen den Fluss nicht verschmutzen.

Einen Fluss umleiten

— To change the course of a river.

Für den Bau der Autobahn musste man den Fluss umleiten.

Often Confused With

Fluss vs Floß

A 'Floß' is a raft (a floating platform), while a 'Fluss' is the river itself.

Fluss vs Flüssigkeit

A 'Flüssigkeit' is any liquid substance (like oil or milk), not a body of water.

Fluss vs Flug

A 'Flug' is a flight. They sound slightly similar if spoken very quickly.

Idioms & Expressions

"Alles ist im Fluss"

— Everything is changing or in motion. Nothing is permanent.

Mach dir keine Sorgen, alles ist im Fluss.

Philosophical/Informal
"In den Fluss kommen"

— To get into a rhythm or a state of productivity.

Nach einer Stunde Arbeit kam ich endlich in den Fluss.

Neutral
"Gegen den Strom schwimmen"

— To go against the majority or the popular opinion.

Er liebt es, gegen den Strom zu schwimmen.

Metaphorical
"Eulen nach Athen tragen / Wasser in den Rhein tragen"

— To do something completely redundant or unnecessary.

Ihm Geld zu schenken ist wie Wasser in den Rhein zu tragen.

Idiomatic
"Den Bach runtergehen"

— To fail completely or to deteriorate (related to water flow).

Ohne Investitionen wird die Firma den Bach runtergehen.

Informal
"Zwei Flüsse, ein Ziel"

— Different paths leading to the same result.

Wir haben verschiedene Methoden, aber zwei Flüsse, ein Ziel.

Poetic
"Den Redefluss unterbrechen"

— To stop someone from talking continuously.

Es war unmöglich, ihren Redefluss zu unterbrechen.

Neutral
"Warten, bis der Fluss die Leichen der Feinde vorbeischwemmt"

— To be patient and let problems solve themselves or enemies fail.

Manchmal muss man nur am Ufer sitzen und warten...

Archaic/Proverbial
"Im Fluss der Rede"

— While speaking continuously.

Im Fluss der Rede vergaß er seinen Namen.

Formal
"Etwas im Fluss halten"

— To keep a process moving or active.

Wir müssen die Verhandlungen im Fluss halten.

Business/Neutral

Easily Confused

Fluss vs Bach

Both are flowing water.

A Bach is small and shallow; a Fluss is large and deep.

Wir sind über den Bach gesprungen, aber den Fluss mussten wir mit dem Boot überqueren.

Fluss vs Strom

Both mean river.

Strom is used for very large rivers or electricity. Fluss is the general word.

Der Nil ist ein gewaltiger Strom.

Fluss vs Kanal

Both look like waterways.

Kanal is artificial/man-made. Fluss is natural.

Der Fluss schlängelt sich durch die Natur, der Kanal ist schnurgerade.

Fluss vs See

Both are bodies of water.

A See (lake) is standing water. A Fluss (river) is flowing water.

Im See kann man tauchen, im Fluss gibt es eine Strömung.

Fluss vs Meer

Both are large water bodies.

The Meer (sea/ocean) is saltwater and much larger; the Fluss flows into it.

Der Fluss mündet ins Meer.

Sentence Patterns

A1

Der [Fluss] ist [Adjektiv].

Der Fluss ist breit.

A1

Ich sehe [den Fluss].

Ich sehe den Fluss.

A2

Wir gehen [am Fluss] spazieren.

Wir gehen am Fluss spazieren.

A2

Die Brücke geht [über den Fluss].

Die Brücke geht über den Fluss.

B1

Wegen [des Flusses]...

Wegen des Flusses ist der Boden feucht.

B1

Der Fluss, [Relativsatz]...

Der Fluss, der hier fließt, ist die Elbe.

B2

Es ist wichtig, [den Fluss] zu [Verb].

Es ist wichtig, den Fluss zu schützen.

C1

[Abstraktes Nomen] im Fluss der [Zeit/Dinge].

Veränderung im Fluss der Zeit.

Word Family

Nouns

Verbs

Adjectives

Related

How to Use It

frequency

Extremely high in daily life, geography, and environmental contexts.

Common Mistakes
  • Das Fluss ist schön. Der Fluss ist schön.

    'Fluss' is a masculine noun, so it must use 'der', not 'das'.

  • Ich gehe nach dem Fluss. Ich gehe zum Fluss / an den Fluss.

    'Nach' is used for cities and countries. For local destinations like a river, use 'zu' or 'an'.

  • Die Flusse sind lang. Die Flüsse sind lang.

    The plural of 'Fluss' always requires an Umlaut on the 'u'.

  • Ich schwimme am Fluss. Ich schwimme im Fluss.

    'Am Fluss' means on the bank. If you are swimming, you are 'in' the water.

  • Das Wasser des Fluss ist kalt. Das Wasser des Flusses ist kalt.

    In the genitive case, masculine nouns like 'Fluss' add an '-es' ending.

Tips

Case Mastery

Practice the four cases with 'Fluss' daily. 'Der Fluss' (Nom), 'Den Fluss' (Acc), 'Dem Fluss' (Dat), 'Des Flusses' (Gen). It covers all the basic masculine declension rules.

Learn Compounds

German loves compound nouns. Learn 'Fluss' alongside 'Ufer', 'Bett', and 'Lauf'. This multiplies your vocabulary quickly with little extra effort.

Short Vowels

The double 'ss' in 'Fluss' tells you the 'u' is short. Don't stretch it out like 'floooos'. Keep it quick like 'push'.

City Names

Many German cities have the river in their name (e.g., Frankfurt am Main). This helps you remember that 'am' + 'Fluss' is the standard way to describe a location.

Think in Flow

Use 'Fluss' for abstract things like 'Redefluss' (flow of speech) to sound more advanced and native-like.

Umlaut Check

Always double-check the plural 'Flüsse'. The Umlaut is vital for correct grammar and pronunciation.

News Keywords

In German news, 'Hochwasser' (flood) and 'Pegelstand' (water level) are almost always used with 'Fluss'. Learn them as a group.

An vs In

Use 'an' if you are next to the water, and 'in' if you are inside the water. This is a common point of confusion for learners.

Map Study

Look at a map of Germany and name the 'Flüsse' you see. It's a great way to practice the plural and learn geography at the same time.

Philosophical Bonus

Memorize 'Alles ist im Fluss'. It's a great phrase to use in many situations to describe change or progress.

Memorize It

Mnemonic

Think of 'FLuid US' - a river is a 'Fluss' because it's a fluid that surrounds us in nature.

Visual Association

Imagine a giant letter 'S' winding through a field like a river; the 'ss' in 'Fluss' looks like the curves of the water.

Word Web

Wasser Fisch Boot Brücke Ufer Schwimmen Blau Natur

Challenge

Try to name three major German rivers (Flüsse) and use them in a sentence with the word 'Fluss'. For example: 'Der Rhein ist ein Fluss.'

Word Origin

Derived from the Middle High German 'vluʒ' and Old High German 'fluʒ'. It shares a common root with the verb 'fließen'.

Original meaning: A flowing, a stream, or the act of flowing.

Germanic (Indo-European). Cognate with English 'flow' and Dutch 'vloed'.

Cultural Context

Be aware that during flood seasons, discussing 'der Fluss' can be a sensitive topic for those living in flood-prone areas like the Elbe or Ahr valleys.

While English uses 'river' for almost everything, German distinguishes more between 'Bach', 'Fluss', and 'Strom'.

The Blue Danube (An der schönen blauen Donau) by Johann Strauss. The Rhine Gold (Das Rheingold) by Richard Wagner. Die Lorelei, a poem by Heinrich Heine about a siren on a rock above the Rhine.

Practice in Real Life

Real-World Contexts

Geography Lesson

  • Wie heißt dieser Fluss?
  • Wo entspringt der Fluss?
  • Welche Städte liegen an diesem Fluss?
  • Wie lang ist der Fluss?

Planning a Trip

  • Wollen wir am Fluss spazieren gehen?
  • Gibt es dort einen Fluss?
  • Können wir im Fluss schwimmen?
  • Wo ist die nächste Brücke über den Fluss?

Environmental Discussion

  • Der Fluss ist verschmutzt.
  • Wir müssen den Fluss schützen.
  • Der Fischbestand im Fluss sinkt.
  • Der Fluss führt Hochwasser.

Business Logistics

  • Der Fluss ist ein wichtiger Transportweg.
  • Die Schiffe auf dem Fluss haben Verspätung.
  • Der niedrige Wasserstand im Fluss ist ein Problem.
  • Wir nutzen den Fluss für den Güterverkehr.

Philosophy/Psychology

  • Alles ist im Fluss.
  • Der Fluss der Gedanken.
  • Im Fluss sein.
  • Den Redefluss stoppen.

Conversation Starters

"Warst du schon mal am Rhein oder an einem anderen großen Fluss in Deutschland?"

"Gibt es in deiner Heimatstadt einen Fluss, den du besonders magst?"

"Was findest du entspannender: einen Spaziergang am Fluss oder im Wald?"

"Glaubst du, dass Flüsse heute noch wichtig für den Transport von Waren sind?"

"Was ist für dich die schönste Stadt, die an einem Fluss liegt?"

Journal Prompts

Beschreibe einen Fluss, den du einmal besucht hast. Wie sah das Wasser aus? Was hast du dort gemacht?

Stell dir vor, du bist ein Fisch in einem Fluss. Wie sieht dein Tag aus?

Warum sind Flüsse für die Geschichte von Städten so wichtig? Erkläre es an einem Beispiel.

Was bedeutet der Satz 'Alles ist im Fluss' für dein persönliches Leben?

Schreibe eine kurze Geschichte über eine Reise mit einem Boot auf einem langen Fluss.

Frequently Asked Questions

10 questions

Yes, 'Fluss' is always masculine (der Fluss). Even if you are talking about a specific river like 'die Elbe' (which is feminine), the word 'Fluss' itself remains masculine. For example: 'Die Elbe ist ein großer Fluss.'

'Am Fluss' means you are by the river (on the bank), while 'im Fluss' means you are inside the water (swimming). For example: 'Ich sitze am Fluss' vs 'Ich schwimme im Fluss'.

The plural is 'die Flüsse'. Note the Umlaut (u -> ü) and the ending '-e'. For example: 'Deutschland hat viele Flüsse.'

Not directly, but 'Strom' (a synonym for a large river) means electricity. However, 'Stromfluss' means the flow of current. 'Fluss' by itself usually refers to water or the abstract concept of flow.

It is an idiom meaning 'everything is in flux' or 'everything is changing'. It comes from the Greek philosophy 'Panta Rhei'. It is used to say that things are not static.

Use 'Strom' for massive, internationally known rivers like the Rhine, the Danube, or the Amazon, especially in a geographical or poetic context. For everyday usage, 'Fluss' is safer and more common.

Yes, you can talk about the 'Verkehrsfluss' (traffic flow). It describes how well cars are moving on the road without stopping.

It simply means 'river water'. It is a compound noun. For example: 'Das Flusswasser ist nicht zum Trinken geeignet.'

You say 'über den Fluss' (if moving) or 'auf der anderen Seite des Flusses' (if describing the location). For example: 'Wir fahren über den Fluss.'

A 'Nebenfluss' is a tributary—a smaller river that flows into a larger one. For example: 'Der Main ist ein Nebenfluss des Rheins.'

Test Yourself 200 questions

writing

Write a sentence describing a river in your city.

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writing

Explain why rivers are important for cities.

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writing

Describe the difference between 'am Fluss' and 'im Fluss'.

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writing

Write a short story about a boat trip.

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What does 'alles im Fluss' mean to you?

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writing

Describe a 'reißender Fluss'.

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writing

List three compound nouns with 'Fluss'.

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writing

Write a sentence using the genitive case of 'Fluss'.

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writing

Compare a 'Bach' and a 'Fluss'.

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writing

Describe the environmental problems of rivers.

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writing

Write a sentence with 'flussaufwärts'.

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writing

What is a 'Flusskreuzfahrt'?

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writing

Use 'über den Fluss' in a sentence.

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writing

Describe the 'Mündung'.

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writing

Explain 'Informationsfluss'.

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Write a sentence about 'Hochwasser'.

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writing

Describe a 'Flusslandschaft'.

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writing

What is 'Binnenschifffahrt'?

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writing

Use 'Redefluss' in a sentence.

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writing

Describe the sound of a river.

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speaking

Beschreibe deinen Lieblingsfluss.

Read this aloud:

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speaking

Was kann man alles am Fluss machen?

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speaking

Erzähle von einem Erlebnis am Wasser.

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speaking

Warum ist Umweltschutz für Flüsse wichtig?

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speaking

Was bedeutet der Satz 'Alles ist im Fluss'?

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speaking

Welche Flüsse kennst du in Deutschland?

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speaking

Wie sieht ein Fluss in den Bergen aus?

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speaking

Möchtest du eine Flusskreuzfahrt machen? Warum?

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speaking

Was ist der Unterschied zwischen einem Fluss und einem See?

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speaking

Wie wichtig sind Flüsse für die Wirtschaft?

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speaking

Kannst du gut schwimmen? Auch in einem Fluss?

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speaking

Was ist dein Lieblingsort am Fluss?

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speaking

Gibt es in deinem Land viele Flüsse?

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speaking

Was ist gefährlicher: ein Fluss oder das Meer?

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speaking

Wie hat sich die Nutzung von Flüssen über die Jahrhunderte verändert?

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Beschreibe das Geräusch eines Flusses.

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speaking

Was machst du, wenn der Fluss Hochwasser hat?

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speaking

Erzähle von einer berühmten Brücke.

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speaking

Welche Tiere leben im oder am Fluss?

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speaking

Wie fühlt es sich an, am Fluss zu sitzen?

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listening

Listen to the word: 'Fluss'. Is the vowel long or short?

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listening

Which word do you hear: 'Fluss' or 'Floß'?

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listening

Listen to the sentence: 'Wir gehen am Fluss spazieren.' Where are they going?

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listening

Listen to the sentence: 'Der Fluss führt Hochwasser.' What is happening?

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listening

Which preposition is used: 'Ich springe in den Fluss'?

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listening

Listen to the plural: 'Die Flüsse'. How many are there?

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listening

Listen to the compound: 'Flussufer'. What part of the river is it?

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listening

Listen to the case: 'des Flusses'. Which case is it?

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listening

Listen to the direction: 'Flussabwärts'. Which way is it going?

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listening

Listen to the idiom: 'Alles im Fluss'. Is things stable or changing?

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listening

Listen to the word: 'Redefluss'. What is it about?

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listening

Listen to the description: 'Ein reißender Fluss'. Is it calm or fast?

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listening

Listen to the city name: 'Frankfurt am Main'. Which river is it on?

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listening

Listen to the activity: 'Wir überqueren den Fluss'. What are they doing?

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listening

Listen to the sound: 'Das Rauschen des Flusses'. What is it?

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/ 200 correct

Perfect score!

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