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A1 noun #2,800 よく出る 5分で読める

rio

練習する 例文 メモとヒント rio 30秒で
解説 rio in your Level:
At the A1 level, 'rio' is one of the first environmental nouns you learn. You should be able to identify it in simple sentences, know that it is masculine ('o rio'), and use it to describe basic locations. You might say 'O rio é grande' (The river is big) or 'Eu vejo o rio' (I see the river). At this stage, the focus is on basic recognition and the distinction between 'rio' and other basic landscape features like 'praia' (beach) or 'montanha' (mountain). You will also learn the name of major rivers in Portuguese-speaking countries, such as the Tejo or the Amazonas, as part of basic cultural knowledge. The goal is to use 'rio' in simple subject-verb-object structures.
At the A2 level, you begin to use 'rio' with more descriptive adjectives and prepositions of place. You can describe activities happening near the river, such as 'Vamos caminhar perto do rio' (Let's walk near the river) or 'O hotel fica ao lado do rio' (The hotel is next to the river). You also start to understand the plural 'rios' and can talk about the geography of a region in simple terms. You might learn to describe the state of the river, such as 'O rio está limpo' (The river is clean) or 'O rio está sujo' (The river is dirty). This level introduces the concept of the river as a place for leisure and travel.
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At the B1 level, you can discuss the importance of rivers in the environment and economy. You might talk about 'a poluição do rio' (river pollution) or 'a importância do rio para a agricultura' (the importance of the river for agriculture). You are expected to handle more complex sentence structures, such as 'Se o rio transbordar, a vila ficará inundada' (If the river overflows, the village will be flooded). You also begin to encounter 'rio' in more abstract or metaphorical contexts in intermediate reading texts, and you can distinguish between technical terms like 'margem' (bank) and 'corrente' (current).
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At the B2 level, you can use 'rio' in a wide range of idiomatic and metaphorical expressions. You can follow complex documentaries about hydrology or environmental policy involving rivers. You understand nuances like the difference between 'rio caudaloso' (a river with a large flow) and 'rio temporário' (an intermittent river). You can argue for or against the construction of dams ('barragens') and discuss the historical role of rivers in the colonization of Brazil or the development of Portuguese trade routes. Your vocabulary includes related verbs like 'desaguar' (to flow into) and 'nascer' (to rise/originate).
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At the C1 level, 'rio' becomes a tool for sophisticated literary and rhetorical expression. You can appreciate the use of 'rio' in the poetry of Fernando Pessoa or the prose of Guimarães Rosa, where the river often symbolizes the flow of consciousness or the inevitability of fate. You can discuss complex hydrological cycles and the socio-political implications of transboundary rivers. You are comfortable with archaic or highly formal terms related to rivers, such as 'estuário' (estuary) or 'meandro' (meander). You can use the word in complex analogies during professional or academic debates.
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At the C2 level, you have a near-native command of all nuances associated with 'rio'. You can detect subtle cultural references to specific rivers in various Lusophone regions. You can write technical reports on water management or literary critiques focusing on river imagery with absolute precision. You understand the etymological roots and the evolution of the word in the Portuguese language. You can effortlessly switch between the literal geographical meaning and the most abstract philosophical applications of the word, using it with perfect grammatical and stylistic accuracy in any context.
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rio 30秒で

  • Rio is a masculine noun meaning 'river'.
  • It is used for both small and large freshwater streams.
  • Commonly confused with 'rio' (I laugh) from the verb 'rir'.
  • Essential for geography, travel, and environmental discussions.

The Portuguese word rio is a fundamental noun used to describe a natural watercourse, usually freshwater, flowing towards an ocean, sea, lake, or another river. At its most basic level, it represents the lifeblood of geography and civilization. In Portugal and Brazil, rivers are not just geographical features; they are historical markers, transportation hubs, and symbols of national identity. From the mighty Amazonas to the historic Tejo, the concept of a 'rio' encompasses everything from a small stream to a massive body of water.

Geographical Definition
A natural stream of water of usually considerable volume.
Symbolic Meaning
Often used to represent the passage of time or the flow of life.
Grammatical Gender
Masculine (O rio, um rio).

"O rio Tejo banha a cidade de Lisboa com uma luz única."

— Common descriptive usage in Portugal

Understanding 'rio' requires looking beyond the water. It involves understanding the 'margens' (banks), the 'leito' (bed), and the 'foz' (mouth). In Lusophone cultures, rivers are central to music (Fado and Samba), literature, and daily survival. When you say 'rio', you are invoking the image of movement, constant change, and the connection between the interior land and the vast sea.

"As águas do rio correm para o mar sem nunca olhar para trás."

"Pescamos no rio todos os domingos de manhã."

Etymology
Derived from the Latin 'rivus', meaning a small stream.
Plural Form
Rios (e.g., Os rios de Portugal).

"A ponte atravessa o rio de uma ponta à outra."

"O rio está muito cheio depois das chuvas de ontem."

Using the word rio correctly involves mastering its gender and common prepositions. As a masculine noun, it always takes masculine articles: o rio (the river), um rio (a river), alguns rios (some rivers). When describing movement or location relative to a river, Portuguese speakers use specific prepositional contractions.

  • No rio: (In/on the river) - 'Eu nado no rio.'
  • Pelo rio: (By/through the river) - 'O barco segue pelo rio.'
  • Ao longo do rio: (Along the river) - 'Caminhamos ao longo do rio.'
  • Atravessar o rio: (To cross the river).

In descriptive contexts, 'rio' is often followed by its name without the word 'de' in many cases (Rio Amazonas, Rio Tejo, Rio Douro), though some regional variations exist. It is also used in various idiomatic expressions that describe abundance or continuous flow. For example, 'um rio de dinheiro' (a river of money) implies a vast amount of wealth.

"O rio corre calmamente entre as montanhas."

When discussing ecology or geography, you will encounter 'rio' paired with adjectives like 'poluído' (polluted), 'limpo' (clean), 'caudaloso' (mighty/high-volume), or 'seco' (dry). Mastering these pairings will help you sound more natural. Furthermore, the distinction between a 'rio' and a 'ribeiro' (stream/brook) is important; a 'rio' is generally larger and more permanent.

You will hear rio in a variety of settings, from the most mundane to the highly poetic. In daily life, it appears in weather reports ('O nível do rio subiu'), tourism brochures ('Cruzeiro no rio Douro'), and local news ('Construção de uma nova ponte sobre o rio').

In music, particularly in Portuguese Fado, the 'Rio Tejo' is a constant character, representing the soul of Lisbon and the departure of sailors. In Brazilian MPB (Música Popular Brasileira), rivers like the São Francisco (O Velho Chico) are celebrated as sacred entities that sustain life in the arid 'sertão'.

"Onde o rio é mais baiano, o mar é mais brasileiro."

— Common poetic sentiment in Brazil

In academic or environmental contexts, 'rio' is central to discussions about sustainability, hydroelectric power ('barragens no rio'), and water rights. If you are traveling through the interior of Portugal or Brazil, the 'rio' is often the focal point of the town, where people gather for leisure, fishing, or festivals.

The most frequent mistake for beginners is the confusion between the noun rio (river) and the first-person singular present indicative of the verb rir (to laugh), which is also rio.

Noun (River)

"O rio é fundo." (The river is deep.)

Verb (I laugh)

"Eu rio muito." (I laugh a lot.)

Another common error is gender agreement. Since 'rio' ends in 'o', it is masculine. Students sometimes mistakenly use feminine adjectives if they are thinking of 'água' (water), which is feminine. You must say 'o rio frio' (the cold river), not 'a rio fria'.

Additionally, learners often confuse 'rio' with 'mar' (sea). While both are bodies of water, a 'rio' is freshwater and flows in a specific direction, whereas the 'mar' is saltwater. In some regions, people might call a very wide river 'mar', but technically, they remain distinct.

To enrich your vocabulary, it is helpful to know words related to rio that describe different types of watercourses or specific parts of a river.

Ribeiro / Ribeira
A small stream or brook. 'Ribeiro' is masculine, 'Ribeira' is feminine and often refers to the bank of a stream.
Riacho
A creek or a very small river.
Afluente
A tributary; a smaller river that flows into a larger one.
Margem
The riverbank. 'A margem direita' (the right bank).
Foz
The mouth of the river where it meets the sea.
Leito
The riverbed.

Using these terms correctly will make your descriptions of nature much more precise and sophisticated. For instance, instead of saying 'the small river', you can say 'o riacho' or 'o ribeiro'.

How Formal Is It?

難易度

知っておくべき文法

Masculine noun endings in -o

Contractions with 'de' and 'em'

Proper noun capitalization for rivers

Adjective agreement

Homonyms in Portuguese

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レベル別の例文

1

O rio é azul.

The river is blue.

Basic noun-adjective agreement (masculine).

2

Eu vejo um rio.

I see a river.

Use of the indefinite article 'um'.

3

O rio é grande.

The river is big.

Basic descriptive sentence.

4

Onde é o rio?

Where is the river?

Interrogative sentence with 'onde'.

5

O rio tem peixes.

The river has fish.

Verb 'ter' (to have) in the third person.

6

A água do rio é fria.

The river water is cold.

Possessive 'do' (de + o).

7

Nós vamos ao rio.

We are going to the river.

Contraction 'ao' (a + o).

8

O rio Amazonas é longo.

The Amazon river is long.

Proper noun usage.

1

Nós nadamos no rio no verão.

We swim in the river in the summer.

Preposition 'no' (em + o).

2

O rio passa pela cidade.

The river passes through the city.

Preposition 'pela' (por + a).

3

Há muitos barcos no rio.

There are many boats on the river.

Use of 'há' for existence.

4

O rio está muito baixo hoje.

The river is very low today.

Adverb 'muito' modifying the adjective 'baixo'.

5

Eles moram perto do rio.

They live near the river.

Adverbial phrase 'perto de'.

6

O rio é perigoso para nadar.

The river is dangerous for swimming.

Adjective 'perigoso' followed by 'para'.

7

O rio nasce na montanha.

The river starts in the mountain.

Verb 'nascer' meaning 'to originate'.

8

Eu gosto de caminhar à beira do rio.

I like to walk by the riverside.

Phrase 'à beira de'.

1

O rio transbordou por causa da chuva forte.

The river overflowed because of the heavy rain.

Past tense 'transbordou'.

2

A poluição do rio é um problema grave.

The pollution of the river is a serious problem.

Abstract noun 'poluição'.

3

Muitas espécies vivem neste rio.

Many species live in this river.

Demonstrative 'neste' (em + este).

4

O rio fornece água para a plantação.

The river provides water for the plantation.

Verb 'fornecer'.

5

A corrente do rio é muito forte aqui.

The river current is very strong here.

Noun 'corrente'.

6

O rio divide os dois países.

The river divides the two countries.

Verb 'dividir'.

7

Eles construíram uma ponte sobre o rio.

They built a bridge over the river.

Preposition 'sobre'.

8

O rio secou durante a seca extrema.

The river dried up during the extreme drought.

Verb 'secar' in the past.

1

O rio de Janeiro é famoso pelas suas praias.

Rio de Janeiro is famous for its beaches.

Note: 'Rio' as part of a city name.

2

As águas do rio correm para o oceano.

The river waters flow toward the ocean.

Plural 'águas' used poetically.

3

O projeto visa despoluir o rio principal.

The project aims to clean up the main river.

Verb 'despoluir'.

4

O rio é a principal via de transporte na região.

The river is the main transport route in the region.

Noun phrase 'via de transporte'.

5

A bacia do rio Amazonas é a maior do mundo.

The Amazon river basin is the largest in the world.

Technical term 'bacia'.

6

O rio serpenteia pelo vale verdejante.

The river meanders through the green valley.

Verb 'serpentear'.

7

Houve um rio de lágrimas após a notícia.

There was a river of tears after the news.

Metaphorical use of 'rio'.

8

O caudal do rio varia conforme a estação.

The river's flow varies according to the season.

Noun 'caudal'.

1

A foz do rio é um ecossistema riquíssimo.

The mouth of the river is a very rich ecosystem.

Technical term 'foz'.

2

O rio, em seu curso perene, molda a paisagem.

The river, in its perennial course, shapes the landscape.

Adjective 'perene'.

3

A metáfora do rio é recorrente na literatura lusa.

The river metaphor is recurrent in Portuguese literature.

Academic phrasing.

4

O rio serviu de baluarte defensivo durante a guerra.

The river served as a defensive bulwark during the war.

Formal term 'baluarte'.

5

As margens do rio estão repletas de vegetação ripícola.

The riverbanks are full of riparian vegetation.

Technical adjective 'ripícola'.

6

O rio carrega consigo os sedimentos da montanha.

The river carries with it the sediments from the mountain.

Reflexive 'consigo'.

7

A gestão dos recursos hídricos do rio é complexa.

The management of the river's water resources is complex.

Compound noun 'recursos hídricos'.

8

O rio reflete a luz do entardecer como um espelho.

The river reflects the evening light like a mirror.

Simile usage.

1

A efemeridade da vida é amiúde comparada ao fluxo de um rio.

The ephemerality of life is often compared to the flow of a river.

High-level vocabulary 'amiúde', 'efemeridade'.

2

O assoreamento do rio compromete a navegabilidade.

The silting of the river compromises navigability.

Technical term 'assoreamento'.

3

O rio Douro é a espinha dorsal da viticultura duriense.

The Douro River is the backbone of Douro viticulture.

Metaphorical 'espinha dorsal'.

4

A jusante do rio, as águas tornam-se mais turvas.

Downstream, the river waters become more turbid.

Technical term 'a jusante'.

5

A montante, o rio é apenas um fio de água cristalina.

Upstream, the river is just a trickle of crystalline water.

Technical term 'a montante'.

6

O rio exequível para o comércio foi o motor do império.

The navigable river for trade was the engine of the empire.

Formal adjective 'exequível'.

7

A interconectividade dos rios europeus facilitou a migração.

The interconnectivity of European rivers facilitated migration.

Complex abstract noun.

8

O rio é o locus da memória coletiva desta comunidade.

The river is the locus of this community's collective memory.

Latin term 'locus' in Portuguese context.

よく使う組み合わせ

rio abaixo
rio acima
margem do rio
leito do rio
foz do rio
nascente do rio
atravessar o rio
poluição do rio
caudal do rio
peixe do rio

よく使うフレーズ

Ir ao rio
Rio de Janeiro
Rio Amazonas
Rio Tejo
Viver à beira do rio
Seguir o rio
O rio está cheio
O rio está seco
Ponte sobre o rio
Banho de rio

よく混同される語

rio vs rir (verb)

rio vs riu (past tense of rir)

rio vs rio (city)

慣用句と表現

"Levar a água ao seu moinho (similar to 'bringing water to one's mill')"
"Rio que corre não volta atrás (time doesn't go back)"
"Águas passadas não movem moinhos (let bygones be bygones)"
"Em rio de piranha, jacaré nada de costas (be careful in dangerous places)"
"Ir por água abaixo (to go down the drain/fail)"
"Fazer de um cisco um rio (to make a mountain out of a molehill)"
"Um rio de dinheiro (a lot of money)"
"Nadar contra a corrente (to go against the grain)"
"Onde há fumaça, há fogo (related to natural signs, often used with rivers)"
"Peixe fora d'água (someone out of place)"

間違えやすい

rio vs

rio vs

rio vs

rio vs

rio vs

文型パターン

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使い方

homonym

'Rio' is also 'I laugh'. Context: 'Eu rio da piada' vs 'Eu nado no rio'.

city name

Rio de Janeiro is often just called 'Rio'.

よくある間違い
  • Using 'a rio' instead of 'o rio'.
  • Confusing 'rio' (noun) with 'rio' (verb).
  • Using 'rio' when you mean 'mar' (sea).
  • Forgetting to capitalize river names like 'Rio Douro'.
  • Pronouncing 'rio' like 'riu' (which is past tense).

ヒント

Gender Check

Always remember 'rio' is masculine. Use 'o' and 'um'.

Homonym Alert

Context is the only way to tell 'river' from 'I laugh'.

Rio de Janeiro

If someone says 'Vou ao Rio', they usually mean the city.

Major Rivers

Learn Tejo (Portugal) and Amazonas (Brazil) first.

The Initial R

The 'R' at the start of 'rio' is strong.

Prepositions

Use 'no rio' for location and 'pelo rio' for path.

Money

'Um rio de dinheiro' means a lot of money.

River Parts

Learn 'margem' (bank) and 'foz' (mouth).

Fado Music

Listen for 'Rio Tejo' in Portuguese Fado songs.

Leisure

Use 'ir ao rio' for a day trip to a river beach.

暗記しよう

語源

Latin

文化的な背景

The Kwanza River is so important it is the name of the national currency.

The Amazon River is the largest by volume in the world.

The Douro is famous for Port wine production on its banks.

実生活で練習する

実際の使用場面

会話のきっかけ

"Qual é o maior rio do seu país?"

"Você prefere nadar no rio ou no mar?"

"Existe algum rio famoso na sua cidade?"

"Você já fez um passeio de barco num rio?"

"O que você acha da poluição dos rios?"

日記のテーマ

Descreva um rio que você visitou.

Escreva sobre a importância da água dos rios para a vida.

Imagine que você é um peixe vivendo num rio poluído.

Como seria a sua cidade sem o rio que a atravessa?

Crie uma metáfora usando um rio para descrever a sua vida.

よくある質問

10 問

It is masculine: o rio.

It is also 'eu rio', from the verb rir.

The Amazon River (Rio Amazonas).

The plural is 'rios'.

You say 'margem do rio'.

Yes, it is the common nickname for Rio de Janeiro.

A 'riacho' is a small river or creek.

You say 'rio acima' or 'a montante'.

You say 'rio abaixo' or 'a jusante'.

Yes, often to represent time or abundance.

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自分をテスト 180 問

listening

Listen and write: 'O rio Amazonas'.

正解！ おしい！ 正解:
正解！ おしい！ 正解:
listening

Listen and write: 'Vamos ao rio amanhã'.

正解！ おしい！ 正解:
正解！ おしい！ 正解:
listening

Listen and write: 'O nível do rio subiu dois metros'.

正解！ おしい！ 正解:
正解！ おしい！ 正解:
listening

Listen and write: 'O rio é um ecossistema complexo'.

正解！ おしい！ 正解:
正解！ おしい！ 正解:
listening

Listen and write: 'A gestão dos recursos hídricos é vital'.

正解！ おしい！ 正解:
正解！ おしい！ 正解:
listening

Listen and write: 'A interconectividade fluvial facilitou o comércio'.

正解！ おしい！ 正解:
正解！ おしい！ 正解:

/ 180 correct

Perfect score!

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