Explanation at your level:
Dense means thick. Think of a forest with many trees close together. That is a dense forest. You can also have dense fog. It is hard to see in dense fog. It is a simple word for 'packed together'.
Use dense to describe things that are crowded. A dense city has many people in a small space. You can also use it for things like cake. A dense cake is heavy and not airy. It is a useful word for describing physical objects.
In B1, you start using dense for more than just physical objects. You can talk about dense information in a report. This means there is a lot of information in a short space. Remember, don't use it to describe people unless you want to be rude.
At this level, you can use dense to contrast with 'sparse.' A dense population is the opposite of a sparse population. You can also use it in academic writing to describe dense prose, which is writing that is very compact and requires careful reading to understand.
Advanced learners use dense to describe complex textures or abstract concepts. You might describe a dense atmosphere in a room, meaning there is a lot of tension. It is also used in scientific contexts, such as dense matter in physics. The nuance here is about the relationship between space and content.
At the mastery level, dense takes on literary and metaphorical weight. You can speak of a dense narrative that is layered with meaning. It reflects a high level of sophistication. Understanding the etymology—from the Latin densus—helps you see how the word has moved from physical thickness to the density of ideas, emotions, and cultural contexts.
30秒でわかる単語
- Dense means packed together.
- Used for fog, forests, and data.
- Don't use it to describe people.
- The adverb is densely.
When we call something dense, we are describing a state of high concentration. Imagine a sponge; if it is dense, it feels heavy and solid because there is very little air inside. If it is not dense, it is light and airy.
We often use this word to describe environments. A dense forest is one where trees grow so close together that the canopy blocks out most of the sunlight. Similarly, dense fog is so thick that you cannot see more than a few feet in front of you. It is a very useful word for painting a picture of something that feels substantial, heavy, or crowded.
In an intellectual sense, we might describe a textbook or a lecture as dense. This doesn't mean it's physically heavy, but that it is packed with information. It might be difficult to read because every sentence contains so much detail that you have to slow down to fully grasp the meaning.
The word dense has a rich history that travels back to the Latin word densus, which simply meant 'thick' or 'crowded.' It entered the English language in the 16th century, though it was originally used more in scientific or geographical contexts.
Interestingly, the word is related to the Latin condensus, which is where we get the word condense. Think about how steam turns into water droplets; the molecules go from being spread out to being dense. Over the centuries, the word evolved to describe not just physical matter, but also human intelligence or complex writing styles.
It is a classic example of a word that has maintained its core meaning of 'thickness' while expanding its reach into metaphorical territory. It shares roots with various Romance languages, such as the French dense and the Spanish denso, showing just how deeply embedded this concept of 'closeness' is in Western languages.
While dense itself is an adjective, it appears in several ways to describe thickness or lack of clarity. 1. Dense as a brick: This is a harsh way to say someone is not very smart. 2. Dense fog of confusion: Used to describe a moment where someone cannot think clearly. 3. Thick and dense: A common reduplicative phrase used to emphasize the physical density of something like a cake or a forest. 4. Dense with potential: Used to describe a situation or person that has a lot of hidden value. 5. Dense matter: Often used in physics to describe materials like neutron stars.
Dense is a simple one-syllable adjective. It does not have a plural form, but it does have comparative and superlative forms: denser and densest. You can also use the adverb densely, as in 'The city is densely populated.'
Pronunciation is straightforward: /dɛns/. It rhymes with fence, tense, sense, hence, and pense. The 's' sound at the end is unvoiced, meaning you don't use your vocal cords to make the 'z' sound. It is a very crisp, short word that carries a lot of weight in a sentence.
Fun Fact
Related to the word 'condense'.
Pronunciation Guide
Short 'e' sound.
Same as UK.
Common Errors
- Pronouncing as 'dence'
- Adding an extra syllable
- Confusing with 'dance'
Rhymes With
Difficulty Rating
Easy to read
Easy to write
Easy to say
Easy to hear
What to Learn Next
Prerequisites
Learn Next
上級
Grammar to Know
Adjective placement
The dense fog.
Adverb formation
Densely.
Linking verbs
It is dense.
Examples by Level
The forest is very dense.
The forest has many trees.
Adjective after 'is'.
The fog is dense.
The fog is thick.
Adjective describing a noun.
It is a dense cake.
The cake is heavy.
Adjective before a noun.
We saw a dense crowd.
Many people together.
Adjective before a noun.
The smoke is dense.
The smoke is thick.
Adjective after 'is'.
The wool is dense.
The wool is thick.
Adjective after 'is'.
The brush is dense.
The plants are close.
Adjective after 'is'.
The air felt dense.
The air felt heavy.
Adjective after linking verb 'felt'.
The city is densely populated.
The book is very dense.
We walked through dense woods.
The cake was too dense to eat.
The paint is a dense color.
The fabric is dense and warm.
The traffic was dense today.
The jungle is very dense.
His writing style is quite dense.
The lecture was dense with facts.
The scientists studied the dense material.
The fog became more dense at night.
The population is dense in the center.
The forest is so dense, we got lost.
The report is dense and hard to read.
She made a dense, hearty stew.
The atmosphere in the room was dense with tension.
He struggled to follow the dense academic text.
The area has a dense network of roads.
The smoke created a dense cloud over the city.
Her poetry is known for its dense imagery.
The material is dense, which makes it durable.
The forest provides a dense canopy for wildlife.
The data is dense and requires analysis.
The narrative is dense with historical references.
The physicist explained the nature of dense matter.
The city's architecture creates a dense urban landscape.
The prose is intentionally dense to challenge the reader.
The dense vegetation hides the ancient ruins.
The argument was dense and difficult to follow.
The artist used dense layers of oil paint.
The dense fog of war obscured the battlefield.
The novel is a dense tapestry of cultural symbols.
The philosophical treatise is notoriously dense.
The dense concentration of wealth is a social issue.
The dense composition of the music creates a wall of sound.
The dense forest floor is rich in biodiversity.
The dense logic of his proof was impeccable.
The dense atmosphere of the planet is toxic.
The dense history of the region is fascinating.
よく使う組み合わせ
Idioms & Expressions
"thick as a brick"
Very stupid.
He is thick as a brick.
casual"dense as lead"
Very heavy or solid.
The cake was dense as lead.
casual"in a dense fog"
Confused.
I am in a dense fog today.
casual"dense with meaning"
Full of significance.
The poem is dense with meaning.
formal"dense population center"
A big city.
It is a dense population center.
formalEasily Confused
similar root
condensed is a verb/adj for reduction
condensed milk
same meaning
thick is more common
thick soup
similar meaning
compact is for size
compact car
similar meaning
crowded is for people
crowded room
Sentence Patterns
Subject + is + dense
The fog is dense.
Subject + is + a + dense + noun
It is a dense forest.
Subject + is + densely + adverb
The area is densely populated.
Subject + verb + dense + noun
They entered the dense jungle.
Subject + is + dense + with + noun
The book is dense with facts.
語族
Nouns
Verbs
Adjectives
関連
How to Use It
7
Formality Scale
よくある間違い
It is an insult.
Dense refers to compactness, not hardness.
Condensed means reduced in size.
Dense implies a mass of things.
Ends in -se.
Tips
Memory Palace
Imagine a crowded room.
Native Speakers
Use it for fog and forests.
Cultural Insight
Don't insult people.
Grammar Shortcut
Use 'densely' for actions.
Say It Right
Short 'e'.
Don't Make This Mistake
Not for people.
Did You Know?
Related to condense.
Study Smart
Use flashcards.
Better Writing
Use it for complex prose.
Speaking Tip
Use it to describe traffic.
Memorize It
Mnemonic
Dense: Don't Enter, Not Space Enough.
Visual Association
A forest with trees so close you can't walk.
Word Web
チャレンジ
Describe your room using the word dense.
語源
Latin
Original meaning: densus (thick, crowded)
文化的な背景
Avoid calling people dense.
Used often in geography and science.
Practice in Real Life
Real-World Contexts
Geography
- dense forest
- dense population
- dense jungle
Science
- dense material
- dense gas
- high density
Writing
- dense prose
- dense narrative
- dense text
Daily Life
- dense fog
- dense crowd
- dense traffic
Conversation Starters
"What is the most dense forest you have seen?"
"Do you like reading dense books?"
"How do you handle dense traffic?"
"Is your city densely populated?"
"Do you prefer dense or light cake?"
Journal Prompts
Describe a place that felt dense.
Write about a time you were in dense fog.
Why do some people find dense books hard?
How would you describe a dense crowd?
よくある質問
8 問No, only when used for people.
Yes, water is dense.
Densely.
Density.
Yes, in science.
Yes.
Usually, yes.
It is neutral.
自分をテスト
The forest is very ___.
Forests are thick/dense.
What does dense mean?
Dense means packed.
Is it polite to call someone dense?
It is an insult.
Word
意味
Synonyms/Antonyms.
Standard order.
スコア： /5
Summary
Dense describes things that are packed closely together, whether it is trees in a forest or information in a book.
- Dense means packed together.
- Used for fog, forests, and data.
- Don't use it to describe people.
- The adverb is densely.
Memory Palace
Imagine a crowded room.
Native Speakers
Use it for fog and forests.
Cultural Insight
Don't insult people.
Grammar Shortcut
Use 'densely' for actions.
例文
The forest is very dense.
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