污 (wū): dirty, filthy, foul

污 (wū) is a Chinese character meaning “dirty.” Classified as HSK Level 4 (HSK 3.0 Standard, CLEC 2022), it is composed of 氵 (semantic) and 亏 (phonetic). It ranks #1397 in character frequency (SUBTLEX-CH corpus).

Etymologically derived, 污 water. Its radical form 氵 (water) appears in many related characters such as 水 (shuǐ, water), 汉 (hàn, Han ethnic group), 汽 (qì, steam).

Spoken pronunciation

Definitions

  1. dirty
  2. filthy
  3. foul

Etymology & Origin

污

pictophoneticwater

Decomposition: ⿰氵亏 (layout: left-right)

Stroke Order

1
2
3
4
5
6

Practice writing 污 with real-time feedback — trace each stroke in the correct order and build muscle memory in the HanziFeed app.

Words & Compounds

HSK Vocabulary with 污

WordPinyinMeaningHSK
污染verbwū rǎn(lit. and fig.) to pollute4
污水nounwū shuǐsewage6

Common Compounds

WordPinyinMeaning
玷污verbdiàn wūto stain
污点nounwū diǎnstain
污渍nounwū zìstain
污秽adjectivewū huì(literary) dirty
贪污verbtān wūto be corrupt
污迹nounwū jìblotch
污染物nounwū rǎn wùpollutant
污辱verbwū rǔto humiliate
同流合污phrasetóng liú hé wūto wallow in the mire with sb (idiom)
污垢nounwū gòuvariant of 污垢
污蔑verbwū mièvariant of 污衊|污蔑
污言秽语wū yán huì yǔ(idiom) filthy speech
污浊adjectivewū zhuódirty
油污nounyóu wūgreasy dirt
排污verbpái wūto drain sewage
57
Total compounds
42
As first character
26
As last character
32
As middle character

污 appears in 57 compound words: 42 as the first character, 26 as the last, and 32 in a middle position. Compound statistics computed from SUBTLEX-CH and HSK 3.0 vocabulary data.

Strongest Collocations

Characters that most frequently co-occur with 污 in natural Chinese text, ranked by NPMI (Normalized Pointwise Mutual Information) — a statistical measure of association strength.

染rǎn
0.76236,917 co-occurrences
贪tān
0.6495,241 co-occurrences
秽huì
0.558454 co-occurrences
蔑miè
0.538706 co-occurrences
贿huì
0.509834 co-occurrences
水shuǐ
0.48712,846 co-occurrences
企qǐ
0.4683,616 co-occurrences
暂zàn
0.4651,550 co-occurrences
赂lù
0.460234 co-occurrences
泥ní
0.4501,446 co-occurrences

Idioms & Chengyu (10)

大气污染dà qì wū rǎnHSK 4+

air pollution; atmospheric pollution

phrase
环境污染huánjìng wūrǎnHSK 4+

environmental pollution

noun
空气污染kōngqì wūrǎnHSK 4+

air pollution

noun
贪官污吏tānguān-wūlìHSK 7+

corrupt official

phrase
贪污腐化tān wū fǔ huàHSK 7+

(idiom) corruption

phrase
同流合污tóngliúhéwūHSK 4+

to commit evil deeds together with the contemptible and evil people

phrase
污七八糟wū qī bā zāoHSK 5+

variant of 烏七八糟|乌七八糟

phrase
污言秽语wū yán huì yǔHSK 7+

(idiom) filthy speech; obscenities

phrase
藏垢纳污cánggòunàwūHSK 6+

synonym of 藏污納垢 /藏污纳垢 (cángwūnàgòu, “to shelter evil people and countenance evil practices”)

phrase
藏污纳垢cángwūnàgòuHSK 6+

to shelter evil people and countenance evil practices

phrase

Example Sentences

AI-Generated

清晨的污面波光粼粼,倒映着岸边的柳树。

qīng chén de wū miàn bō guāng 粼 粼 , dǎo yìng zhe àn biān de liǔ shù .

The murky surface glistened in the early morning light, reflecting the willow trees along the shore.

99 健康网Feb 2026

...喂奶一边做dna检查有影响吗?母乳成分会污染血液样本吗

. . . wéi nǎi yī biān zuò d n a jiǎn chá yǒu yǐng xiǎng ma ? mǔ rǔ chéng fēn huì wū rǎn xiě yè yàng běn ma

... Does doing a DNA test while breastfeeding make a difference? Can breast milk ingredients contaminate blood samples?

Swi SwissinfoFeb 2026

婴儿奶粉全球召回:污染源来自中国,是巧合吗?

yīng ér nǎi fěn quán qiú zhào huí : wū rǎn yuán lái zì zhōng guó , shì qiǎo gě ma ?

Global recall of infant milk powder: Is it a coincidence that the source of pollution comes from China?

马来西亚诗华日报新闻网Feb 2026

杨善勇:养猪场困局,不是在污染

yáng shàn yǒng : yǎng zhū chǎng kùn jú , bù shì zài wū rǎn

Yang Shanyong: The dilemma of pig farms is not pollution

東森新聞Feb 2026

高金素梅诈助理费再扩大!张琼姿餐厅卷贪污案

gāo jīn sù méi zhà zhù lǐ fèi zài kuò dà ! zhāng 琼 zī cān tīng juǎn tān wū àn

Gao Jin Sumei's fraud assistant fee is expanded again! Zhang Qiongzi's restaurant is involved in the corruption case

It之家Feb 2026

...究表明:监管缺失的商业航天活动正成为大气污染新威胁

. . . jiū biǎo míng : jiān guǎn quē shī de shāng yè háng tiān huó dòng zhèng chéng wéi dà qì wū rǎn xīn wēi xié

... Research shows that commercial space activities without regulation are becoming a new threat to air pollution

Tatoeba

工厂的废料导致了严重的环境污染。

Gōngchǎng de fèiliào dǎozhì le yánzhòng de huánjìng wūrǎn.

The factory waste gave rise to serious environmental pollution.

Tatoeba

废水经常污染海洋。

Fèishuǐ jīngcháng wūrǎn hǎiyáng.

Sewage often pollutes the ocean.

Tatoeba

空气被废气污染了。

Kōngqì bèi fèiqì wūrǎn le.

The air was polluted by exhaust gas.

Tatoeba

这座村没有空气污染。

Zhè zuò cūn méiyǒu kōngqìwūrǎn.

This village is free from air pollution.

Character Family

Semantic Family — Characters sharing the 氵 (water) component

Homophones — Characters pronounced wū

Frequently Asked Questions

What does 污 (wū) mean in Chinese?
污 (wū) primarily means "dirty." It is classified as HSK Level 4, making it an upper-intermediate character. It ranks #1397 in character frequency.
What's the difference between 污 and 洁?
污 (wū) and 洁 (jié) are often confused. antonym. The key distinguishing feature: 污 (dirty) vs 洁 (clean).
How many strokes does 污 have?
污 is written with 6 strokes. The correct stroke order matters for recognition and handwriting speed — practice with the animated guide above to build proper technique.
What is the radical of 污?
The radical associated with 污 is 氵 (water). This radical appears in many characters related to water.
What are the components of 污?
污 is composed of: 氵 (semantic), 亏 (phonetic). Its IDS decomposition is ⿰氵亏 with a left-right layout. Understanding the components helps with both memorization and recognizing related characters.
What are common words containing 污?
Common words with 污 include: 污染 (wū rǎn, "(lit. and fig.) to pollute"); 玷污 (diàn wū, "to stain"); 污点 (wū diǎn, "stain"); 污渍 (wū zì, "stain"); 污水 (wū shuǐ, "sewage"). There are over 57 compound words containing this character.
What characters sound the same as 污 (wū)?
Several characters share the pronunciation wū: 物 ((bound form) thing), 务 (affair), 五 (five), 武 (martial), and 5 more. Context and tones help distinguish between them in speech and writing.
Is 污 the same in simplified and traditional Chinese?
Yes, 污 is written the same way in both simplified and traditional Chinese.

Practice writing 污 with real-time feedback

Trace stroke sequences, hear spoken pronunciation, and build lasting retention with spaced repetition in the HanziFeed app.

Character data sourced from Unihan (Unicode Consortium), SUBTLEX-CH frequency corpus (Cai & Brysbaert, 2010), and Make Me a Hanzi (stroke data). Collocation strength measured via NPMI (Normalized Pointwise Mutual Information). Verified by the HanziFeed linguistics team.

HSK classification follows the HSK 3.0 Standard (Center for Language Education and Cooperation, CLEC, 2022 revision). Idiom data from Wiktionary (CC BY-SA 3.0).

Data last verified: March 2026.