疑 (yí): (bound form) to doubt, to suspect

疑 (yí) is a Chinese character meaning “(bound form) to doubt.” Classified as HSK Level 4 (HSK 3.0 Standard, CLEC 2022), it is composed of 匕 (structural), 矢 (structural) and 疋 (structural). It ranks #698 in character frequency (SUBTLEX-CH corpus).

Etymologically derived, 疑 an old man walking 疋 while holding 匕 a cane 矢. Its radical form 疋 (bolt of cloth) appears in many related characters such as 疏 (shū, to dredge).

Spoken pronunciation

Definitions

  1. (bound form) to doubt
  2. to suspect

Etymology & Origin

疑

ideographicAn old man walking 疋 while holding 匕 a cane 矢

Stroke Order

1
2
3
4
5
6
7
8
9
10
11
12
13
14

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

Words & Compounds

HSK Vocabulary with 疑

WordPinyinMeaningHSK
怀疑verbhuái yíto doubt (sth)4
质疑verbzhì yíto call into question6
疑问nounyí wènquestion5
无疑verbwú yíundoubtedly6
疑惑verb/nounyí huòto doubt6

Common Compounds

WordPinyinMeaning
毫无疑问phraseháo wú yí wèncertainty
嫌疑犯nounxián yí fàna suspect
疑犯nounyí fàna suspect
嫌疑人nounxián yí réna suspect
可疑adjectivekě yísuspicious
嫌疑nounxián yísuspicion
疑虑verbyí lǜhesitation
多疑adjectiveduō yímistrustful
疑点nounyí diǎna doubtful point
疑心nounyí xīnsuspicion
深信不疑phraseshēn xìn bù yíto believe firmly without any doubt (idiom)
迟疑verbchí yíto hesitate
起疑qǐ yíto begin to suspect
猜疑verbcāi yíto suspect
疑云nounyí yúna haze of doubts and suspicions
69
Total compounds
43
As first character
48
As last character
9
As middle character

疑 appears in 69 compound words: 43 as the first character, 48 as the last, and 9 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 疑 in natural Chinese text, ranked by NPMI (Normalized Pointwise Mutual Information) — a statistical measure of association strength.

怀huái
0.58917,171 co-occurrences
嫌xián
0.58217,033 co-occurrences
似sì
0.55318,078 co-occurrences
惑huò
0.5393,640 co-occurrences
质zhì
0.51317,899 co-occurrences
犯fàn
0.5079,238 co-occurrences
悬xuán
0.4972,426 co-occurrences
肇zhào
0.48314 co-occurrences
猜cāi
0.4481,414 co-occurrences
揉róu
0.43911 co-occurrences

Idioms & Chengyu (10)

半信半疑bànxìn-bànyíHSK 4+

half-believing, half-doubting; not quite convinced

phrase
不容置疑bùróngzhìyíHSK 5+

to allow or admit no doubt; to not open to doubt; to be beyond doubt; to be absolutely certain

phrase
毫不迟疑háobùchíyíHSK 6+

without the slightest hesitation; did not hesitate (to)

phrase
毫无疑问háowúyíwènHSK 6+

undoubtedly; without a doubt; certainly

phrase
将信将疑jiāngxìn-jiāngyíHSK 4+

to take with a pinch of salt; to be doubtful; to be not quite convinced

phrase
深信不疑shēnxìnbùyíHSK 4+

to firmly believe without any doubt

phrase
无可置疑wúkězhìyíHSK 5+

indubitable; unquestionable

phrase
疑难杂症yínán zázhèngHSK 6+

intractable diseases; obscure diseases; intractable problems

noun
疑神疑鬼yíshén-yíguǐHSK 7+

to be extremely suspicious; to be afraid of one's own shadow

phrase
疑问代词yíwèn dàicíHSK 5+

interrogative pronoun

noun

Example Sentences

AI-Generated

疑字由14笔画组成,结构很巧妙。

yí zì yóu bǐ huà zǔ chéng , jié gòu hěn qiǎo miào .

The character "疑" consists of 14 strokes and has a remarkably ingenious structure.

Hk01.comFeb 2026

夜王—杨偲泳性感镜头疑遭刻意删减 公开绝密福利照凭歌寄意回应

yè wáng — yáng 偲 yǒng xìng gǎn jìng tóu yí zāo kè yì shān jiǎn gōng kāi jué mì fú lì zhào píng gē jì yì huí yīng

Night King - Yang Siyong's sexy footage is suspected of being deliberately deleted, and the public top-secret welfare photos respond with songs

NewtalkFeb 2026

男子骑车出游经南横疑自撞护栏 坠边坡送医不治

nán zǐ qí chē chū yóu jīng nán héng yí zì zhuàng hù lán zhuì biān pō sòng yī bù zhì

The man was riding a bicycle through South Heng and was suspected of crashing into a guardrail and falling down a slope and was taken to hospital where he died

Nownews今日新聞Feb 2026

《异能》金度勋疑吃Karina豆腐!被目击揉她手指 亲喊...

yì néng jīn dù xūn yí chī K a r i n a dòu fǔ ! bèi mù jī róu tā shǒu zhǐ qīn hǎn . . .

"Superpower" Kim Do-hoon suspected of eating Karina tofu! was seen rubbing her fingers and shouting...

東方日報Feb 2026

上水粉锦公路3狗疑被虐待 1狗尾巴几乎甩脱

shàng shuǐ fěn jǐn gōng lù 3 gǒu yí bèi nüè dài 1 gǒu wěi bā jī hū shuǎi tuō

Sheung Shui Fenjin Highway 3 dogs suspected of being abused 1 dog's tail almost fell off

百度新闻Feb 2026

回应法国质疑 欧委会称受邀参加“和平委员会”会议是....

huí yīng fǎ guó zhì yí ōu wěi huì chèn shòu yāo cān jiā hé píng wěi yuán huì huì yì shì . . . .

In response to France's doubts, the European Commission said it was invited to participate in the meeting of the "Peace Commission"....

Tatoeba

两个侦探跟着嫌疑人。

Liǎng gè zhēntàn gēnzhe xiányírén.

Two detectives followed the suspect.

Tatoeba

警方逮捕了嫌疑人。

Jǐngfāng dàibǔ le xiányírén.

The police arrested the suspect.

Tatoeba

汤姆怀疑地看着玛丽。

Tāngmǔ huáiyí de kàn zhe Mǎlì.

Tom looked at Mary suspiciously.

Tatoeba

汤姆怀疑玛丽是否诚实。

Tāngmǔ huáiyí Mǎlì shìfǒu chéngshí.

Tom doubts whether Mary is honest.

Character Family

疋 Radical Family — Characters sharing the bolt of cloth radical

Related Characters

Homophones — Characters pronounced yí

Frequently Asked Questions

What does 疑 (yí) mean in Chinese?
疑 (yí) primarily means "(bound form) to doubt." It is classified as HSK Level 4, making it an upper-intermediate character. It ranks #698 in character frequency.
How many strokes does 疑 have?
疑 is written with 14 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 疑?
The radical associated with 疑 is 疋 (bolt of cloth). This radical appears in many characters related to bolt of cloth.
What are the components of 疑?
疑 is composed of: 匕 (structural), 矢 (structural), 疋 (structural). Understanding the components helps with both memorization and recognizing related characters.
What are common words containing 疑?
Common words with 疑 include: 怀疑 (huái yí, "to doubt (sth)"); 毫无疑问 (háo wú yí wèn, "certainty"); 嫌疑犯 (xián yí fàn, "a suspect"); 疑犯 (yí fàn, "a suspect"); 嫌疑人 (xián yí rén, "a suspect"). There are over 69 compound words containing this character.
What characters sound the same as 疑 (yí)?
Several characters share the pronunciation yí: 一 (one), 以 (to use), 意 (meaning, idea), 已 (already), and 6 more. Context and tones help distinguish between them in speech and writing.
Is 疑 the same in simplified and traditional Chinese?
Yes, 疑 is written the same way in both simplified and traditional Chinese.

Practice writing 疑 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.