因 (yīn): cause, reason, because

因 (yīn) is a Chinese character meaning “cause.” Classified as HSK Level 2 (HSK 3.0 Standard, CLEC 2022), it is composed of 囗 (structural) and 大 (structural). It ranks #96 in character frequency (SUBTLEX-CH corpus).

Spoken pronunciation

Definitions

  1. cause
  2. reason
  3. because

Stroke Order

1
2
3
4
5
6

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

Words & Compounds

HSK Vocabulary with 因

WordPinyinMeaningHSK
因为preposition/conjunctionyīn wèibecause2
原因nounyuán yīncause4
因此conjunctionyīn cǐthus4
基因nounjī yīngene (loanword)6
因素nounyīn sùelement5
因而conjunctionyīn értherefore5

Common Compounds

WordPinyinMeaning
可卡因nounkě kǎ yīncocaine (loanword)
死因nounsǐ yīncause of death
海洛因nounhǎi luò yīn(loanword) heroin
因果nounyīn guǒkarma
爱因斯坦proper-nounài yīn sī tǎnAlbert Einstein (1879-1955), German-born theoretical physicist
咖啡因nounkā fēi yīncaffeine (loanword)
病因nounbìng yīncause of disease
起因nounqǐ yīncause
因特网proper-nounyīn tè wǎngInternet
因子nounyīn zǐfactor
得梅因proper-noundé méi yīnDes Moines, capital of Iowa
诱因nounyòu yīncause
缅因proper-nounmiǎn yīnMaine, US state
成因nounchéng yīncause
基因组nounjī yīn zǔgenome
100
Total compounds
31
As first character
38
As last character
31
As middle character

因 appears in 100 compound words: 31 as the first character, 38 as the last, and 31 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 因 in natural Chinese text, ranked by NPMI (Normalized Pointwise Mutual Information) — a statistical measure of association strength.

此cǐ
0.699650,016 co-occurrences
原yuán
0.517183,592 co-occurrences
瘙sào
0.49129 co-occurrences
素sù
0.45670,568 co-occurrences
痒yǎng
0.42134 co-occurrences
病bìng
0.41338,628 co-occurrences
但dàn
0.41292,768 co-occurrences
为wéi
0.411229,827 co-occurrences
而ér
0.410182,877 co-occurrences
嫌xián
0.4089,504 co-occurrences

Idioms & Chengyu (22)

爱因斯坦ÀiyīnsītǎnHSK 7+

Einstein

陈陈相因chénchénxiāngyīnHSK 7+

to become stagnant or obsolete due to rigid adherence to tradition; to be devoid of any innovation

phrase
倒果为因dàoguǒwéiyīnHSK 4+

to reverse the cause and the effect; to reverse causality

phrase
基因工程jīyīn gōngchéngHSK 4+

genetic engineering

noun
基因突变jīyīn tūbiànHSK 4+

gene mutation; genetic mutation

noun
基因治疗jīyīn zhìliáoHSK 5+

gene therapy

noun
兰因絮果lán yīn xù guǒHSK 7+

starts well but ends in separation (of marital relations)

phrase
普鲁卡因pǔlǔkǎyīnHSK 7+

procaine

noun
前因后果qiányīnhòuguǒHSK 2+

the entire sequence of events (including its cause and outcome)

phrase
因材施教yīncáishījiàoHSK 5+

to teach according to the student's ability

phrase
因地制宜yīndìzhìyíHSK 5+

to formulate strategies according to local conditions

phrase
因祸得福yīnhuòdéfúHSK 5+

to benefit from one's own misfortune

phrase

Showing 12 of 22 idioms containing 因.

Example Sentences

AI-Generated

因为下雨,原定的户外活动取消了。

Yīnwèi xià yǔ, yuándìng de hùwài huódòng qǔxiāo le.

Due to rain, the scheduled outdoor activities were canceled.

EttodayFeb 2026

...男下車墜橋亡」!家屬悲赴殯儀館 相驗追死因

. . . nán xià 車 墜 橋 wáng ! jiā 屬 bēi fù 殯 儀 館 xiāng 驗 zhuī sǐ yīn

Man Falls to Death from Bridge After Getting Out of Car! Family Members Heartbroken as They Head to Funeral Home; Autopsy to Determine Cause of Death

東方日報Feb 2026

許光漢日本新片突然停拍 製作公司親解原因

許 guāng 漢 rì běn xīn piàn tū rán tíng pāi 製 zuò gōng sī 親 jiě yuán yīn

Hsu Kuang-han's New Japanese Film Suddenly Halts Production; Production Company Explains Reason

BastillepostFeb 2026

科學重大突破!研究證實:貓咪癌症基因與人類高度相似 有助開發新療法

kē 學 chóng dà tū pò ! yán jiū 證 實 貓 咪 ái zhèng jī yīn 與 rén 類 gāo dù xiāng sì yǒu zhù 開 發 xīn 療 fǎ

Major scientific breakthrough! Research confirms: Cat cancer genes highly similar to humans, paving the way for new therapies

LtnFeb 2026

網友推估年收破3億 老高小茉不生孩子原因曝光

網 yǒu tuī gū nián shōu pò 億 lǎo gāo xiǎo 茉 bù shēng hái zǐ yuán yīn pù guāng

Netizens estimate annual income exceeds 300 million yuan; reason why Lao Gao and Xiao Mo don't have children revealed

EttodayFeb 2026

...嚴禁送孩出國留學」否則斷金援:不認孩!原因曝

. . . 嚴 jīn sòng hái chū 國 liú 學 fǒu 則 斷 jīn yuán bù 認 hái ! yuán yīn pù

"Strictly Prohibited: Sending Children Abroad for Education" Otherwise, Financial Support Will Be Cut Off: No Recognition of Children! Reason Revealed

LtnFeb 2026

...楊高架小黃乘客離奇墜橋亡 檢警相驗釐清原因

. . . 楊 gāo jià xiǎo 黃 chéng kè 離 qí 墜 橋 wáng 檢 jǐng xiāng 驗 釐 qīng yuán yīn

Passenger Falls to Death from Yang Elevated Highway in Bizarre Incident; Prosecutors and Police Conduct Autopsy to Determine Cause

百度新闻Feb 2026

斯洛伐克政府因乌克兰中断俄罗斯石油过境运输,宣布自..

sī 洛 fá kè zhèng fǔ yīn wū kè lán zhōng duàn é luó sī shí yóu guò jìng yùn shū , xuān bù zì . .

The Government of Slovakia, in response to Ukraine's interruption of Russian oil transit, has announced that since...

Tatoeba

我有必要向他解释原因吗?

Wǒ yǒu bìyào xiàng tā jiěshì yuányīn ma?

Is it necessary for me to explain the reason to him?

Tatoeba

爆炸的原因是什么?

Bàozhà de yuányīn shì shénme?

What was the cause of the explosion?

Character Family

Homophones — Characters pronounced yīn

Frequently Asked Questions

What does 因 (yīn) mean in Chinese?
因 (yīn) primarily means "cause." It is classified as HSK Level 2, making it a beginner-level character. It ranks #96 in character frequency.
How many strokes does 因 have?
因 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 因?
The radical associated with 因 is 囗 (enclosure). This radical appears in many characters related to enclosure.
What are the components of 因?
因 is composed of: 囗 (structural), 大 (structural). Its IDS decomposition is ⿴囗大 with a full-surround layout. Understanding the components helps with both memorization and recognizing related characters.
What are common words containing 因?
Common words with 因 include: 因为 (yīn wèi, "because"); 原因 (yuán yīn, "cause"); 因此 (yīn cǐ, "thus"); 基因 (jī yīn, "gene (loanword)"); 可卡因 (kě kǎ yīn, "cocaine (loanword)"). There are over 100 compound words containing this character.
What characters sound the same as 因 (yīn)?
Several characters share the pronunciation yīn: 引 (to draw (e.g. a bow)), 音 (sound), 印 (to print), 银 (silver, bank), and 5 more. Context and tones help distinguish between them in speech and writing.
Is 因 the same in simplified and traditional Chinese?
No. The simplified form is 因 and the traditional form is 囙.

Practice writing 因 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.