澄む in 30 Seconds

  • Verb: 澄む (sumu)
  • Meaning: To become clear, transparent (water, air).
  • Figurative: Mind/heart becomes clear or calm.
  • Contexts: Nature, weather, mental states.

The Japanese verb 澄む (sumu) is used to describe a state of becoming clear, transparent, or pure. It's most commonly applied to natural elements like water or air, indicating that they have lost their turbidity or impurity and are now pristine and easy to see through. Think of a lake after a storm has passed, or a sky after a period of fog has lifted. This word evokes a sense of clarity, calmness, and often, a pleasant or refreshing feeling.

Natural Clarity
When talking about bodies of water such as lakes, rivers, or the sea, 澄む signifies that the water has become clear, allowing you to see the bottom or observe aquatic life. This can happen naturally due to weather changes, sediment settling, or purification processes.

雨が止んで、空気が澄んだ。

The rain stopped, and the air became clear.
Atmospheric Purity
Similarly, 澄む is used to describe the atmosphere or air becoming clear and crisp. This often happens after rain, snow, or strong winds that clear away pollution or haze. A clear, crisp sky is often described as 澄んだ空 (sunda sora).

湖の水が澄んでいる。

The lake water is clear.
Figurative and Emotional Clarity
Beyond the literal, 澄む can also be used metaphorically to describe a state of mental or emotional clarity. When someone's mind becomes clear after confusion, or when emotions settle down into a calm state, this verb can be employed. It suggests a resolution of inner turmoil or a return to a peaceful state of being.

彼の心は澄んでいた。

His mind was clear.

In essence, 澄む is about achieving a state of purity and clarity, whether it's in the physical world or the inner landscape of one's mind. It's a beautiful word that conveys a sense of peace and natural order.

Mastering the usage of 澄む (sumu) involves understanding its grammatical function as a verb and how it interacts with different sentence structures and contexts. Since it describes a state of becoming clear, it often appears in sentences discussing changes in natural conditions or emotional states. Pay attention to how particles like が (ga) and the past tense 澄んだ (sunda) are used to convey specific meanings.

Basic Structure: Subject + が + 澄む
The most common structure involves a subject, often referring to water, air, or a sky, followed by the particle が (ga) and then the verb 澄む. This structure indicates that the subject is the thing that is becoming clear.

川の水が澄んでいる。

The river water is becoming clear.
Describing a State: 澄んでいる
To describe a state where something *is* clear, you use the te-form of the verb plus いる (iru), resulting in 澄んでいる (sunde iru). This is very common for describing current conditions.

空気が澄んでいて、星がよく見える。

The air is clear, and the stars are visible.
Past Tense: 澄んだ
When referring to a past event where something became clear, you use the past tense 澄んだ (sunda). This is often used to describe changes that have already occurred.

嵐の後、海は澄んだ。

After the storm, the sea became clear.
Figurative Usage: Mental and Emotional States
The verb can also be used for abstract concepts like one's mind or heart becoming clear, often after a period of confusion or distress. In these cases, the subject is usually a person or their mental state.

心配事がなくなって、頭が澄んだ。

My worries disappeared, and my head became clear.

Practicing with these different sentence patterns will help you use 澄む naturally and accurately in your Japanese conversations and writing.

You'll encounter the verb 澄む (sumu) in a variety of everyday and literary contexts in Japanese. Its pleasant connotation of clarity and purity makes it a favorite for describing natural beauty and serene states. Understanding these common scenarios will help you recognize and use the word more effectively.

Nature Documentaries and Travelogues
When showcasing pristine natural environments, especially those with clear water or unpolluted skies, 澄む is frequently used. You'll hear it in descriptions of clear lakes in Hokkaido, the transparent waters of Okinawa's coral reefs, or the crisp air of mountain resorts during winter.

この湖は、水が澄んでいて魚がたくさん見える。

In this lake, the water is clear and many fish can be seen.
Poetry and Literature
The word's evocative nature makes it a staple in Japanese poetry and prose. Authors often use 澄む to paint vivid pictures of natural landscapes or to describe a character's inner peace and clarity. It's particularly common in haiku and tanka.

秋の空が澄んできた。

The autumn sky has become clear.
Weather Forecasts and Descriptions
When describing good weather conditions, especially after rain or fog, meteorologists might use 澄む to indicate clear skies and good visibility. Phrases like 「空気が澄むでしょう」(kuuki ga sumu deshou - the air will likely become clear) are common.

雨がやんで、空が澄んだ。

The rain stopped, and the sky cleared up.
Everyday Conversations about Scenery
In casual conversations, Japanese speakers might use 澄む to comment on the pleasantness of the current weather or environment. For instance, someone might say 「今日の空気は澄んでいて気持ちがいいね」(kyou no kuuki wa sunde ite kimochi ga ii ne - the air today is clear and feels good, doesn't it?).

By listening to how native speakers use 澄む in these diverse settings, you'll gain a deeper appreciation for its nuance and applicability.

While 澄む (sumu) is a relatively straightforward verb, learners can sometimes make mistakes, particularly when distinguishing it from similar concepts or applying it too broadly. Understanding these common pitfalls can help you use the word more accurately and confidently.

Confusing Literal and Figurative Meanings
The most frequent error is misapplying the literal meaning of clear water or air to abstract concepts, or vice versa. For instance, saying 「彼の話は澄んでいた」(kare no hanashi wa sunde ita) might sound odd if you mean his story was clear and easy to understand; a word like 分かりやすかった (wakari yasukatta) would be more appropriate. 澄む for mental clarity usually refers to a state of peace or absence of confusion, rather than simple comprehensibility.

✕ 彼の話は澄んでいた。

〇 彼の話は分かりやすかった。

Incorrect: His story was clear. Correct: His story was easy to understand.
Using it for 'Clean' or 'Tidy'
澄む is not typically used to mean 'clean' in the sense of being free from dirt or tidiness. For example, you wouldn't say a room is 澄んだ (sunda) to mean it's tidy. For 'clean' regarding dirt, use 綺麗 (kirei) or 清潔 (seiketsu). For 'tidy,' use 整頓 (seiton) or きちんとしている (kichinto shite iru).

✕ 部屋が澄んだ。

〇 部屋が綺麗になった。

Incorrect: The room became clear. Correct: The room became clean.
Overusing it for 'Bright' or 'Sunny'
澄む describes clarity, not necessarily brightness or sunshine. While clear skies often accompany sunshine, the word itself focuses on the absence of haze, fog, or turbidity. For 'bright' or 'sunny,' use terms like 明るい (akarui) or 晴れている (harete iru).

✕ 今日は空が澄んでいる。

〇 今日は空が晴れている。

Incorrect: The sky is clear today. Correct: The sky is sunny/clear today.
Incorrect Verb Conjugation
Like any verb, 澄む must be conjugated correctly. Common mistakes include using the wrong te-form or not applying the past tense appropriately. For example, using 澄んだ (sunda) when you mean the present continuous state 澄んでいる (sunde iru) can lead to grammatical errors.

By being aware of these potential issues, you can avoid common errors and use 澄む with greater accuracy and confidence.

While 澄む (sumu) specifically refers to becoming clear and transparent, especially for natural elements, several other Japanese words share similar nuances or can be used as alternatives depending on the exact context. Understanding these distinctions is key to precise communication.

清らか (Kiyoraka) - Pure, Clear (Adjective)
Difference: 澄む often implies a change from a less clear state to a clear one, focusing on the process or result of becoming transparent. 清らか (kiyoraka) is an adjective that describes a state of inherent purity, often with a moral or spiritual connotation. It can describe clear water, but also a pure heart or a virtuous person.
Example:清らかな水」(kiyoraka na mizu) - Pure water. 「澄んだ水」(sunda mizu) - Clear water (implying it became clear).
透明 (Toumei) - Transparent, Clear (Noun/Na-adjective)
Difference: 透明 (toumei) directly translates to 'transparent' and focuses on the property of allowing light to pass through without scattering. 澄む is a verb describing the *process* of becoming transparent or the resulting state, often in a more naturalistic or aesthetic sense. 透明 can be used for materials other than water or air, like glass or plastic.
Example: 「ガラスは透明だ」(garasu wa toumei da) - Glass is transparent. 「澄んだ空気」(sunda kuuki) - Clear air (implying it has become so).
晴れる (Hareru) - To clear up, To be sunny (Verb)
Difference: 晴れる (hareru) specifically refers to the weather clearing up, usually from cloudy or rainy conditions to become sunny. While clear skies often result from 澄む, 晴れる focuses on the presence of sunshine and the absence of rain or heavy clouds.
Example: 「雨がやんで、空が晴れてきた」(ame ga yande, sora ga harete kita) - The rain stopped, and the sky started to clear up (become sunny). 「雨がやんで、空が澄んできた」(ame ga yande, sora ga sunde kita) - The rain stopped, and the sky became clear (less hazy, more transparent).
静まる (Shizumaru) - To become quiet, To calm down (Verb)
Difference: 静まる (shizumaru) means to become quiet or calm, and is often used for noise, activity, or emotions. While a clear state can be associated with calmness, 澄む is about clarity and transparency, whereas 静まる is about the cessation of disturbance.
Example: 「騒ぎが静まった」(sawagi ga shizumatta) - The commotion died down. 「心が澄んだ」(kokoro ga sunda) - The heart/mind became clear (peaceful).

By understanding these subtle differences, you can select the most appropriate word to convey your intended meaning with precision.

How Formal Is It?

Fun Fact

The kanji 澄 itself is composed of the radical 'water' (氵) and 'blue/green' (青), suggesting its original association with clear, pure water or the clear blue of the sky. The combination evokes a sense of pristine natural beauty.

Pronunciation Guide

UK /sɯmɯ/
US /sɯmɯ/
No strong stress.
Rhymes With
む (mu) つむ (tsumu) くむ (kumu) しむ (shimu) すむ (sumu) - itself ひむ (himu) よむ (yomu) とむ (tomu)
Common Errors
  • Pronouncing the vowels too long.
  • Adding an unnecessary 'u' sound after 's' or 'm' in English words when trying to mimic.
  • Incorrectly stressing a syllable.

Difficulty Rating

Reading 3/5

The basic meaning is straightforward, but figurative uses and nuanced contexts can increase difficulty. Understanding its application in poetry or scientific texts requires more advanced vocabulary and comprehension.

Writing 3/5

Easy to use in basic sentences about nature. More challenging to employ effectively in figurative or abstract contexts without sounding unnatural or incorrect.

Speaking 3/5

Basic usage is easy to acquire. Advanced or figurative usage requires practice and exposure to native speech.

Listening 3/5

Recognizing the word is generally easy in contexts of nature or weather. Distinguishing its figurative meanings in conversation or media requires careful listening.

What to Learn Next

Prerequisites

水 (mizu) - water 空気 (kuuki) - air 空 (sora) - sky きれい (kirei) - beautiful, clean わかる (wakaru) - to understand

Learn Next

濁る (nigoru) - to become cloudy/muddy 曇る (kumoru) - to become cloudy (weather) 晴れる (hareru) - to clear up (weather) 透明 (toumei) - transparent 静まる (shizumaru) - to become quiet/calm

Advanced

澄み切る (sumikiru) - to become perfectly clear 澄み渡る (sumi-wataru) - to stretch out clearly (sky, sea) 清らか (kiyoraka) - pure, clear (adjective) 明瞭 (meiryou) - clear, distinct (speech, meaning)

Grammar to Know

Te-form + いる for ongoing states

水が澄んでいる。(Mizu ga sunde iru.) - The water is clear (and remains so).

Past tense for completed actions/changes

空が澄んだ。(Sora ga sunda.) - The sky became clear.

Using 澄んだ as an adjective before a noun

澄んだ空気。(Sunda kuuki.) - Clear air.

Figurative use with 心 (kokoro) or 頭 (atama)

心が澄む。(Kokoro ga sumu.) - The heart/mind becomes clear.

Using particles like が (ga) to mark the subject becoming clear

空気澄んでいる。(Kuuki ga sunde iru.) - The air is clear.

Examples by Level

1

水が澄んでいる。

The water is clear.

This uses the te-form + iru to describe a current state.

2

空気が澄んでいる。

The air is clear.

Describes the state of the air.

3

雨の後、空が澄んだ。

After the rain, the sky cleared up.

Uses the past tense to indicate a change that has happened.

4

湖が澄んでいる。

The lake is clear.

Similar to water, but specifically for a lake.

5

空は澄んでいる。

The sky is clear.

Focuses on the sky itself being clear.

6

澄んだ水。

Clear water.

Adjectival use of the past tense form.

7

澄んだ空気。

Clear air.

Adjectival use of the past tense form.

8

川が澄んでいる。

The river is clear.

Describing the state of a river.

1

山の空気はとても澄んでいる。

The air in the mountains is very clear.

Adds intensity with 'very' (totemo).

2

この井戸の水はいつも澄んでいる。

The water from this well is always clear.

Uses 'always' (itsumo) to describe a consistent state.

3

秋の空は澄んでいて気持ちがいい。

The autumn sky is clear and feels good.

Connects the clarity of the sky to a pleasant feeling.

4

透明なガラスのように澄んでいる。

It's as clear as transparent glass.

Uses a simile (like transparent glass) for emphasis.

5

数日後、水は澄んできた。

After a few days, the water became clear.

Indicates a gradual change over time.

6

彼の心は澄んでいた。

His mind was clear.

Figurative use for mental clarity.

7

澄んだ声で歌った。

She sang with a clear voice.

Figurative use for a voice that is pure and resonant.

8

澄んだ音色が響いた。

A clear tone echoed.

Figurative use for a pure, distinct sound.

1

澄んだ空気の中で深呼吸をした。

I took a deep breath in the clear air.

Combines the adjective phrase with an action.

2

澄んだ瞳で私を見つめた。

She gazed at me with clear eyes.

Figurative use for eyes that are bright and free from deception.

3

澄んだ水面には月が映っていた。

The moon was reflected on the clear water surface.

Describes a beautiful natural scene involving clarity.

4

長雨の後、ようやく空気が澄んできた。

After the long rain, the air finally began to clear.

Uses 'finally' (youyaku) to emphasize the wait for clarity.

5

澄んだ心で物事を判断したい。

I want to judge things with a clear mind.

Figurative use for impartiality and lack of prejudice.

6

澄んだ音色を奏でる楽器。

A musical instrument that plays clear tones.

Describing the quality of a musical instrument's sound.

7

水質調査の結果、水は完全に澄んでいることがわかった。

As a result of the water quality survey, it was found that the water is completely clear.

Formal context, often related to scientific observation.

8

澄んだ青空が広がっていた。

A clear blue sky was spreading out.

Emphasizes the vastness of the clear sky.

1

澄んだ水は、その地域の生態系の健康状態を示す指標となる。

Clear water serves as an indicator of the health of the region's ecosystem.

More technical or scientific context, explaining significance.

2

困難な状況を乗り越え、彼の心は以前にも増して澄んできた。

Having overcome difficult circumstances, his mind became even clearer than before.

Figurative use, indicating growth and improved mental state after hardship.

3

澄んだ空気と満点の星空は、都会では決して味わえない贅沢だ。

The clear air and a sky full of stars are a luxury one can never experience in the city.

Contrasts the experience of clarity with urban life.

4

彼女の澄んだ歌声は、聴く者の心を癒やす力を持っていた。

Her clear singing voice had the power to heal the listener's heart.

Figurative use, emphasizing the emotional impact of a clear voice.

5

水質改善の努力が実り、かつて濁っていた川が今では澄んでいる。

The efforts to improve water quality have paid off, and the river that was once murky is now clear.

Highlights the result of improvement efforts.

6

澄んだ音色を響かせる古楽器の演奏会。

A concert featuring ancient instruments that produce clear tones.

Specific context of classical music or historical instruments.

7

澄んだ思考は、複雑な問題を解決するための第一歩である。

Clear thinking is the first step to solving complex problems.

Abstract concept, linking mental clarity to problem-solving.

8

澄んだ水滴が葉の上に光っていた。

Clear water droplets were shining on the leaves.

Focuses on small, clear elements in nature.

1

澄んだ精神状態は、創造性の開花に不可欠な土壌となる。

A clear mental state becomes the essential soil for the blossoming of creativity.

Metaphorical and abstract, linking clarity to creativity.

2

澄んだ水は、単に視覚的な美しさだけでなく、生命の源泉としての重要性も示唆している。

Clear water not only possesses visual beauty but also suggests its importance as a source of life.

Discusses the deeper significance beyond mere appearance.

3

長年の瞑想修行を経て、彼の内面は澄み渡り、煩悩から解放された境地に至った。

After years of meditation practice, his inner self became perfectly clear, reaching a state of liberation from worldly desires.

Advanced figurative use, implying spiritual clarity and enlightenment.

4

澄んだ音階は、聴く者に純粋な感動を与える。

Clear musical scales give listeners pure emotional resonance.

Focuses on the aesthetic and emotional impact of pure sound.

5

環境保護活動の成果として、かつて汚染されていた河川が再び澄んだ輝きを取り戻した。

As a result of environmental protection activities, the once-polluted river has regained its clear radiance.

Highlights the positive outcome of environmental efforts.

6

澄んだ判断力は、不確実な状況下で的確な意思決定を行うための基盤となる。

Clear judgment serves as the foundation for making accurate decisions under uncertain circumstances.

Abstract, linking mental clarity to strategic decision-making.

7

澄んだ空気は、人々の健康だけでなく、精神的な安寧にも寄与する。

Clear air contributes not only to people's health but also to their mental peace.

Discusses dual benefits of clear air: physical and mental.

8

澄んだ瞳の奥に、隠された真実の片鱗が見えた。

In the depths of her clear eyes, I glimpsed a hint of the hidden truth.

Figurative use, suggesting insight and hidden knowledge revealed through clear eyes.

1

澄んだ水は、自然界における調和と浄化の象徴であり、生命維持の根幹をなす。

Clear water is a symbol of harmony and purification in nature, forming the bedrock of life sustenance.

Philosophical and symbolic interpretation.

2

複雑な感情の渦が収まり、彼の心は禅僧のような澄明さを帯びた。

As the swirling complexities of his emotions subsided, his mind took on a clarity akin to that of a Zen monk.

Sophisticated figurative language, drawing parallels to spiritual states.

3

澄んだ空気は、都市の喧騒から離れた場所でしか得られない、貴重な恩恵である。

Clear air is a precious boon obtainable only in places far removed from the clamor of the city.

Emphasizes the rarity and value of clear air.

4

澄んだ音色は、単なる音の響きを超え、聴く者の魂に直接語りかける。

Clear tones transcend mere sound resonance, speaking directly to the listener's soul.

Elevated language describing the profound impact of pure sound.

5

環境再生への取り組みが実を結び、かつて死の川と呼ばれた水域が、今や澄んだ生命の息吹を取り戻している。

The efforts towards environmental regeneration have borne fruit, and the waterway once called a dead river is now regaining its clear breath of life.

Poetic and impactful description of environmental recovery.

6

澄んだ理性は、感情の波に惑わされることなく、真実への道を照らし出す。

Clear reason, unswayed by emotional tides, illuminates the path to truth.

Abstract and philosophical, contrasting reason with emotion.

7

澄んだ瞳の奥に宿る知性は、言葉を超えた深い洞察力を示唆していた。

The intelligence residing within her clear eyes suggested a profound insight that transcended words.

Interpreting subtle cues of intelligence and insight.

8

澄んだ水滴が朝露となり、新たな一日の始まりを静かに告げていた。

Clear water droplets became morning dew, quietly announcing the start of a new day.

Poetic and symbolic use, connecting clarity to new beginnings.

Common Collocations

澄んだ水
澄んだ空気
澄んだ空
澄んだ声
澄んだ瞳
澄んだ心
澄んだ音色
澄んだ青空
澄んだ湖
澄んだ思考

Common Phrases

澄んでいる

— Is clear/transparent. Used to describe the current state of water, air, etc.

この川の水はとても澄んでいる。(Kono kawa no mizu wa totemo sunde iru.) - The water in this river is very clear.

澄んだ

— Clear/transparent (adjective form). Often used before a noun.

澄んだ空気の中で散歩した。(Sunda kuuki no naka de sanpo shita.) - I took a walk in the clear air.

澄んだ目

— Clear eyes, often implying innocence, honesty, or a lack of deception.

子供の澄んだ目を見て、安心した。(Kodomo no sunda me o mite, anshin shita.) - Seeing the child's clear eyes, I felt relieved.

澄んだ心

— A clear and peaceful mind, free from worries or confusion.

澄んだ心で新しい一日を始めたい。(Sunda kokoro de atarashii ichinichi o hajimetai.) - I want to start the new day with a clear mind.

澄んだ音

— A clear, pure sound.

澄んだ音に耳を澄ませた。(Sunda oto ni mimi o sumaseta.) - I listened intently to the clear sound.

澄んだ空気が気持ちいい

— It feels good to have clear air.

澄んだ空気が気持ちいいから、窓を開けた。(Sunda kuuki ga kimochi ii kara, mado o aketa.) - I opened the window because the clear air feels good.

澄んだ水

— Clear water.

澄んだ水で顔を洗った。(Sunda mizu de kao o aratta.) - I washed my face with clear water.

澄んだ声

— A clear voice.

彼女は澄んだ声で歌った。(Kanojo wa sunda koe de utatta.) - She sang with a clear voice.

澄んだ青空

— A clear blue sky.

澄んだ青空の下でピクニックをした。(Sunda aozora no shita de pikunikku o shita.) - We had a picnic under the clear blue sky.

澄んだ泉

— A clear spring.

澄んだ泉から水を汲んだ。(Sunda izumi kara mizu o kunda.) - I drew water from a clear spring.

Often Confused With

澄む vs 清らか (kiyoraka)

澄む often implies a change to clarity, while 清らか emphasizes inherent purity, sometimes with moral undertones.

澄む vs 透明 (toumei)

澄む is a verb describing the process or state of becoming clear, whereas 透明 is a noun/adjective focusing on the property of transparency itself.

澄む vs 晴れる (hareru)

晴れる specifically refers to weather becoming sunny, while 澄む refers to the air/sky becoming clear, not necessarily sunny.

Idioms & Expressions

"澄んだ心で"

— With a clear mind; with pure intentions; without prejudice or bias.

相手の言葉を澄んだ心で聞くことが大切だ。

Neutral
"澄んだ水面に映る"

— To be reflected on the surface of clear water; often used metaphorically to describe self-reflection or understanding.

自分の過ちが澄んだ水面に映るように見えた。

Literary
"澄んだ空気を吸う"

— To breathe in clear air; literally, to enjoy fresh, unpolluted air, or figuratively, to experience a refreshing or pure environment.

都会の喧騒を離れて、澄んだ空気を吸いたい。

Neutral
"澄んだ声で話す"

— To speak with a clear voice; implying clarity, honesty, or a pleasant tone.

彼は澄んだ声で、自分の意見をはっきり述べた。

Neutral
"澄んだ瞳に宿る"

— Residing in clear eyes; suggesting innocence, purity, truthfulness, or deep insight.

彼女の澄んだ瞳には、嘘偽りはなかった。

Literary
"澄んだ音色"

— A clear, pure tone or timbre of a musical instrument or voice.

そのバイオリンの澄んだ音色は、聴く者の心を打った。

Neutral
"澄んだ思考"

— Clear thinking; logical and uncluttered thought processes.

複雑な問題には、澄んだ思考が必要だ。

Formal
"澄んだ泉"

— A clear spring; often used metaphorically to represent a source of purity, truth, or inspiration.

彼の言葉は、枯れることのない澄んだ泉のようだった。

Literary
"澄んだ水のように"

— Like clear water; used to describe something that is transparent, pure, or easily understood.

彼の説明は澄んだ水のように分かりやすかった。

Neutral
"澄んだ息"

— Clear breath; can refer to literal fresh air or a figurative sense of relief and purity.

山頂で澄んだ息を吸い込んだ。

Neutral

Easily Confused

澄む vs 濁る (nigoru)

Both <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>澄む</mark> and <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>濁る</mark> describe the state of water.

<mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>澄む</mark> means to become clear, transparent, and pure. <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>濁る</mark> means to become cloudy, muddy, or turbid. They are direct opposites when describing water.

雨の後、川の水は<strong>澄ん</strong>だ。(Ame no ato, kawa no mizu wa <strong>sun</strong>da.) - After the rain, the river water became clear. / 泥をかき混ぜて、水が<strong>濁っ</strong>た。(Doro o kakimazete, mizu ga <strong>nigor</strong>tta.) - Stirring the mud made the water cloudy.

澄む vs 曇る (kumoru)

Both <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>澄む</mark> and <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>曇る</mark> relate to the sky and atmosphere.

<mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>澄む</mark> describes the sky or air becoming clear, transparent, and free of haze. <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>曇る</mark> means to become overcast or cloudy, obscuring the sun and reducing clarity.

晴れた日の空は<strong>澄ん</strong>でいる。(Hareta hi no sora wa <strong>sun</strong>de iru.) - The sky on a sunny day is clear. / 今日は空が<strong>曇っ</strong>ている。(Kyou wa sora ga <strong>kumo</strong>tte iru.) - Today the sky is cloudy.

澄む vs 透明 (toumei)

Both relate to the concept of clarity and being see-through.

<mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>澄む</mark> is a verb describing the process or state of becoming clear, often with an aesthetic or naturalistic nuance. <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>透明</mark> is a noun or na-adjective that refers to the physical property of transparency itself, allowing light to pass through without scattering. You can have <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>澄ん</mark>だ (clear) water, and that water is also <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>透明</mark> (transparent).

このガラスは<strong>透明</strong>だ。(Kono garasu wa <strong>toumei</strong> da.) - This glass is transparent. / 湖の水が<strong>澄ん</strong>でいる。(Mizu ga <strong>sun</strong>de iru.) - The lake water is clear.

澄む vs 静まる (shizumaru)

Both can describe a calming effect, especially metaphorically.

<mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>澄む</mark> refers to clarity and purity, often associated with a peaceful state of mind. <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>静まる</mark> specifically means to become quiet, to cease making noise, or for activity to die down. While a clear mind can be quiet, <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>澄む</mark> focuses on the clarity, and <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>静まる</mark> on the absence of disturbance.

嵐の後、海は<strong>澄ん</strong>だ。(Arashi no ato, umi wa <strong>sun</strong>da.) - After the storm, the sea became clear. / 騒ぎが<strong>静まっ</strong>た。(Sawagi ga <strong>shizu</strong>matta.) - The commotion died down.

澄む vs 晴れる (hareru)

Both relate to improving weather conditions.

<mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>澄む</mark> describes the air or sky becoming clear and transparent, free from haze or fog. <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>晴れる</mark> specifically means the weather clearing up to become sunny, with the absence of rain and clouds.

雨がやんで、空が<strong>澄ん</strong>できた。(Ame ga yande, sora ga <strong>sun</strong>de kita.) - The rain stopped, and the sky became clear. / 雨がやんで、空が<strong>晴れ</strong>てきた。(Ame ga yande, sora ga <strong>hare</strong>te kita.) - The rain stopped, and the sky started to clear up (become sunny).

Sentence Patterns

A1

Noun + が + 澄んでいる。

水が澄んでいる。(Mizu ga sunde iru.)

A1

Noun + が + 澄んだ。

空が澄んだ。(Sora ga sunda.)

A2

澄んだ + Noun

澄んだ空気。(Sunda kuuki.)

A2

Figurative Noun + は + 澄んでいる。

彼の心は澄んでいる。(Kare no kokoro wa sunde iru.)

B1

Noun + は + 澄んでいて + Adjective/Verb。

空は澄んでいて、星がよく見える。(Sora wa sunde ite, hoshi ga yoku mieru.)

B1

Context + 澄んだ + Noun + を + Verb。

澄んだ声で歌った。(Sunda koe de utatta.)

B2

Noun + は + 澄む + こと + が + Important/Good。

澄んだ水は大切だ。(Sunda mizu wa taisetsu da.)

C1

Abstract Noun + は + 澄む + こと + に + 通じる。

澄んだ思考は解決に繋がる。(Sunda shikou wa kaiketsu ni tsunagaru.)

Word Family

Nouns

澄み (sumi) - clarity, clearness

Verbs

澄む (sumu) - to become clear
澄ます (sumasu) - to make clear, to compose oneself

Related

澄み切る (sumikiru) - to become perfectly clear
澄み渡る (sumi-wataru) - to stretch out clearly (sky, sea)
澄まし顔 (sumashigao) - an innocent or composed look
澄み具合 (sumi-guai) - the degree of clarity
澄み場 (sumiba) - a clear spot (e.g., in a lake)

How to Use It

frequency

Common, especially in descriptions of nature and positive states.

Common Mistakes
  • Using '澄む' to mean 'clean' like a tidy room. 部屋が綺麗になった。(Heya ga kirei ni natta.)

    <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>澄む</mark> means to become clear and transparent, particularly for water or air. For cleanliness of objects or spaces, use '綺麗' (kirei) or '清潔' (seiketsu).

  • Confusing '澄む' (clear) with '晴れる' (sunny). 空が澄んでいる。(Sora ga sunde iru.)

    <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>澄む</mark> refers to the clarity of the air or sky (absence of haze/fog). <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>晴れる</mark> specifically means the weather is clearing up to be sunny. You can have clear skies that are not sunny, and sunny skies that might still have some haze.

  • Using '澄む' for sounds that are merely loud or distinct, not pure. 大きな音。(Ookina oto.) / はっきりした音。(Hakkiri shita oto.)

    '澄んだ声' or '澄んだ音' refers to a voice or sound that is pure, clear, and pleasant. For sounds that are simply loud or distinct, use words like '大きい' (ookii - big/loud) or 'はっきりした' (hakkiri shita - clear/distinct).

  • Applying '澄む' to abstract concepts incorrectly, like '澄んだ話' (sunda hanashi - clear story). 分かりやすい話。(Wakariyasui hanashi.)

    While <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>澄む</mark> can mean a clear mind, applying it to a story implies it's easy to understand. For that, '分かりやすい' (wakariyasui - easy to understand) is more appropriate. <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>澄む</mark> for the mind means calm and free from confusion.

  • Using '澄んだ' when describing a state that is inherently pure, rather than having become clear. 清らかな心。(Kiyoraka na kokoro.)

    <mark class='bg-yellow-200 dark:bg-yellow-700 px-0.5 rounded'>澄む</mark> often implies a change or process of becoming clear. For something that is inherently pure or virtuous, '清らか' (kiyoraka) is often a better fit, especially for abstract qualities like heart or spirit.

Tips

Visual Association

Picture a perfectly clear, calm lake with the sun shining on it. The word 澄む (sumu) evokes this image of pristine, undisturbed clarity. Associate the 'su' sound with 'pure' and the 'mu' sound with 'calm'.

Even Stress

The Japanese word 澄む (sumu) has a relatively flat intonation without strong stress on any particular syllable. Practice saying it smoothly to sound more natural.

Antonym Focus

Learn the direct antonyms like 濁る (nigoru - to become muddy) for water and 曇る (kumoru - to become cloudy) for the sky. Understanding opposites can solidify the meaning of 澄む.

State vs. Change

Remember that 澄んでいる (sunde iru) describes a current state of clarity, while 澄んだ (sunda) indicates that something has *become* clear.

Appreciating Nature

The concept of 澄む is tied to the Japanese appreciation for natural beauty and purity. When you encounter this word, think about the serene feelings associated with pristine environments.

Sentence Creation

Try creating your own sentences using 澄む. Describe a recent weather change, a clear body of water you've seen, or a moment of mental clarity.

Figurative Nuance

When 澄む is used metaphorically for the mind or heart, it suggests peace, lack of confusion, and emotional clarity, similar to 'serene' or 'lucid'.

Listen Actively

When watching Japanese dramas, movies, or listening to music, actively listen for instances of 澄む and note how native speakers use it in different contexts.

Compound Forms

Be aware of related compound verbs like 澄み切る (sumikiru - to become perfectly clear) and 澄み渡る (sumi-wataru - to stretch out clearly), which add emphasis or describe a wider scope.

Memorize It

Mnemonic

Imagine a 'SUM' of pure water in a lake. When the lake is clear, you can see all the 'SUM' of the rocks and plants at the bottom. The 'SUM' of clarity is what 澄む represents.

Visual Association

Picture a crystal-clear mountain lake. The water is so transparent you can see every pebble on the bottom. This image of pristine, undisturbed clarity is the essence of 澄む.

Word Web

Clear Transparent Pure Water Air Sky Calm Serene Pristine Lucid

Challenge

Try to describe three different things you saw today that were 'clear' using 澄む or its related forms. For example, the sky, a glass of water, or your thoughts after a good night's sleep.

Word Origin

The word 澄む (sumu) has ancient roots in the Japanese language. It is believed to have evolved from older Japanese words related to purity and clearness. Its usage has remained consistent over centuries, primarily describing natural phenomena and later extending to abstract concepts.

Original meaning: The core meaning revolves around 'purity', 'clarity', and 'transparency'.

Japonic

Cultural Context

The word itself is generally positive and evokes pleasant imagery. Using it to describe water or air is neutral. Using it for mental states can be positive, implying peace and clarity.

In English, we use words like 'clear,' 'transparent,' 'pristine,' 'calm,' or 'serene' depending on the context. While 'clear' is a direct translation, the Japanese word 澄む often carries a stronger aesthetic and emotional connotation of natural purity and inner peace.

Haiku poetry often features imagery of clear skies, water, and the resulting sense of clarity, using words like 澄む. Descriptions of famous Japanese natural sites like Lake Ashi or the waters of Okinawa frequently employ 澄む to highlight their beauty. Zen Buddhist teachings often emphasize achieving a 'clear mind,' which can be related to the figurative meaning of 澄む.

Practice in Real Life

Real-World Contexts

Describing natural scenery, especially lakes, rivers, or the ocean.

  • 澄んだ水
  • 澄んだ湖
  • 澄んだ海

Talking about weather and atmospheric conditions.

  • 澄んだ空気
  • 澄んだ空
  • 澄んだ青空

Expressing a state of mental or emotional clarity and peace.

  • 澄んだ心
  • 澄んだ思考
  • 澄んだ瞳

Describing pure or clear sounds.

  • 澄んだ声
  • 澄んだ音色
  • 澄んだ音

Scientific or environmental reports on water quality.

  • 水質が澄んでいる
  • 澄んだ水質

Conversation Starters

"What's your favorite natural place where the water is really clear?"

"Do you prefer clear skies or cloudy skies? Why?"

"When was the last time you felt your mind was completely clear?"

"What kind of music do you find has the clearest or purest sound?"

"After a long period of stress, what helps you feel mentally clear again?"

Journal Prompts

Describe a memory of being in a place with incredibly clear water. What did it look like, feel like, and smell like?

Write about a time when your thoughts felt jumbled and confused, and then how you achieved a sense of mental clarity. What steps did you take?

Imagine you are a poet writing about a perfectly clear autumn sky. Use descriptive language to capture the feeling of that clarity.

Reflect on the importance of clear communication. How does 'clarity' in speech or writing affect understanding and relationships?

Think about a sound that you find particularly 'clear' or 'pure.' Describe it and the emotions it evokes.

Frequently Asked Questions

10 questions

Yes, 澄む can be used figuratively. Most commonly, it describes a person's mind or heart becoming clear, calm, and free from confusion or emotional distress. For example, '彼の心は澄んでいる' (Kare no kokoro wa sunde iru) means 'His heart/mind is clear'.

'澄む' (sumu) specifically means to become clear and transparent, often implying a natural state of purity. 'きれい' (kirei) is a broader term that means 'beautiful,' 'pretty,' or 'clean.' While clear water can be 'きれい,' '澄む' focuses on the transparency itself. You wouldn't say a room is '澄んだ' to mean it's clean; you'd use 'きれい' or '清潔 (seiketsu)'.

'澄んだ' (sunda) is the past tense, indicating that something *became* clear at some point. For example, '雨の後、空が澄んだ' (After the rain, the sky became clear). '澄んでいる' (sunde iru) describes a state that *is currently* clear. For example, 'この湖の水は澄んでいる' (The water of this lake is clear).

Generally, yes. The state of being clear, whether physically or mentally, is usually perceived positively. It evokes feelings of purity, peace, and refreshment. However, the context matters; for instance, a clear diagnosis might be unwelcome news, but the clarity itself is a neutral fact.

While 澄む is primarily used for natural elements, its figurative use for mental states is common. For artificial objects like glass, '透明' (toumei - transparent) is usually the more direct and common term. However, in a poetic context, one might describe glass as having a '澄んだ' quality if it evokes a sense of pristine clarity.

'澄んだ声' (sunda koe) implies a voice that is pure, clear, and resonant, often associated with beauty and pleasantness. '明瞭な声' (meiryou na koe) means a voice that is distinct and easy to understand, focusing on audibility and lack of ambiguity. A voice can be both, but '澄んだ' has a more aesthetic quality.

No, 澄む is not typically used to describe taste. For taste, you would use words like 'あっさりした' (assari shita - light, plain taste) or 'すっきりした' (sukkiri shita - refreshing, clean taste).

The concept of clarity and purity inherent in 澄む aligns well with Japanese aesthetics that value simplicity, naturalness, and the absence of clutter. A clear, unadorned scene or a calm mind are often seen as ideal states.

Yes, the negative forms exist, such as '澄まない' (sumanai - does not become clear) or '澄んでいない' (sunde inai - is not clear). For example, 'この水は澄んでいない' (Kono mizu wa sunde inai - This water is not clear).

The kanji 澄 is composed of the 'water' radical (氵) on the left and 'blue/green' (青) on the right. Imagine clear, blue water. This visual association can help you remember the meaning of clarity and purity associated with the kanji and the verb 澄む.

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