(): to think, thought

() is a Chinese character meaning “to think, thought.” Classified as HSK Level 2 (HSK 3.0 Standard, CLEC 2022), it is composed of (structural) and (structural). It ranks #298 in character frequency (SUBTLEX-CH corpus).

Etymologically derived, weighing something with your mind 囟 (altered) and heart 心. Its radical form (heart) appears in many related characters such as (wàng, to forget), (xiǎng, to think, to want), (ài, to love).

Native pronunciation

Definitions

  1. to think, thought

Etymology & Origin

ideographicWeighing something with your mind 囟 (altered) and heart 心

Decomposition: ⿱田心 (layout: top-bottom)

Stroke Order

1
2
3
4
5
6
7
8
9

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

Words & Compounds

HSK Vocabulary with

WordPinyinMeaningHSK
nounyì siidea2
bù hǎo yì sito feel embarrassed2
yǒu yì siinteresting2
nounsī xiǎngthought5
noun/verbsī wéi(line of) thought5
méi yì siboring2
verbsī niànto think of6
nounsī lùline of thought6
verbfǎn sīto think back over sth6

Common Compounds

WordPinyinMeaning
sī kǎoto reflect on
xīn simind
mǎ kè sīMarx (name)
gòu sīto design
sī xùtrain of thought
xiǎo yì sismall token
chén sīto contemplate
sī suǒto think deeply
hǎo yì sito have the nerve
xún sīto consider
shēn sīto ponder
wén sīthe train of thought in writing
sī xiǎng jiāthinker
sī liangto reckon
xiāng sīto yearn
100
Total compounds
39
As first character
44
As last character
17
As middle character

appears in 100 compound words: 39 as the first character, 44 as the last, and 17 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 in natural Chinese text, ranked by NPMI (Normalized Pointwise Mutual Information) — a statistical measure of association strength.

xiǎng
0.697284,574 co-occurrences
suī
0.60598 co-occurrences
0.58397 co-occurrences
0.575200,468 co-occurrences
hàn
0.48316,518 co-occurrences
nán
0.479102 co-occurrences
0.46286 co-occurrences
cháo
0.45118,336 co-occurrences
guàn
0.44712 co-occurrences
0.44336,936 co-occurrences

Idioms & Chengyu (34)

bǎisībùjiěHSK 3+

incomprehensible; perplexed still despite much thought

phrase
bǎi sī mò jiěHSK 7+

see 百思不解[bai3 si1 bu4 jie3]

phrase
bìménsīguòHSK 5+

to shut oneself away and reflect on one’s mistakes

phrase
bùhǎoyìsiHSK 2+

embarrassed; shy; ill at ease; too embarrassed or shy to do something

adjective
bùjiāsīsuǒHSK 5+

synonym of 不假思索 (bùjiǎsīsuǒ, “without hesitation; without thought”)

phrase
bùjiǎsīsuǒHSK 5+

without hesitation

phrase
bùkěsīyìHSK 3+

inconceivable; unimaginable; incomprehensible; incomprehensible by the human mind

adjectivenoun
chá fàn bù sīHSK 2+

no thought for tea or rice (idiom); melancholic and suffering; to have no appetite

phrase
zhāosīmùxiǎngHSK 7+

to yearn for something day and night; to long for something deeply

phrase
ChéngjísīhánHSK 6+

Genghis Khan

dǔwùsīrénHSK 7+

seeing things left behind by someone or the belongings of the deceased triggers one's memories of that person

phrase
fā rén shēn sīHSK 4+

(idiom) thought-provoking; to give one food for thought

phrase

Showing 12 of 34 idioms containing .

Example Sentences

AI-Generated

考问题时要全面考虑,不能只看表面现象。

Sīkǎo wèntí shí yào quánmiàn kǎolǜ, bùnéng zhǐ kàn biǎomiàn xiànxiàng.

When thinking about problems, consider them comprehensively; don't just look at surface phenomena.

UdnnewsindexFeb 2026

治疗迷难解...罕病SMA病人约4分之1未接受...

zhì liáo mí sī nán jiě . . . hǎn bìng S M A bìng rén yuē 4 fēn zhī 1 wèi jiē shòu . . .

Treatment myths are hard to solve... About one-quarter of patients with rare SMA do not receive it...

中時新聞網Feb 2026

...市长人选民众各有所好 杨阵营诉求“分工”

. . . shì cháng rén xuǎn mín zhòng gè yǒu suǒ hǎo yáng zhèn yíng sù qiú fēn gōng sī wéi

... The mayoral candidates have their own preferences, and the Yang camp appeals for "division of labor" thinking

Fx168 Finance NetworkFeb 2026

江沐洋:2.24国际黄金原油走势分析操作路-FX168

jiāng mù yáng : 2 . 2 4 guó jì huáng jīn yuán yóu zǒu shì fēn xī cāo zuò sī lù F X 1 6 8

Jiang Muyang: 2.24 International gold and crude oil trend analysis operation ideas-FX168

Nownews今日新聞Feb 2026

小江蕙81岁母亲初二离世!陈安忍3天痛揭噩耗:爸妈天上团聚了

xiǎo jiāng 蕙 8 1 suì mǔ qīn chū èr lí shì ! chén sī ān rěn 3 tiān tòng jiē è hào : bà mā tiān shàng tuán jù le

Xiao Jianghui's 81-year-old mother passed away on the second day of junior high school! Chen Si'an endured for 3 days to reveal the bad news: his parents were reunited in heaven

百度新闻Feb 2026

...们是谁”:拼写争议背后的加拿大国族认同迷

. . . men shì shéi pīn xiě zhēng yì bēi hòu de jiā ná dà guó zú rèn tóng mí sī

... Who are we": The myth of Canadian national identity behind the spelling controversy

Tatoeba

这个词是什么意

Zhège cí shì shénme yìsi?

What does this word mean?

Tatoeba

您知道这个词的意吗?

Nín zhīdào zhège cí de yìsi ma?

Do you know the meaning of this word?

Tatoeba

不好意,我想请问去车站怎么走?

Bù hǎoyìsi, wǒ xiǎng qǐngwèn qù chēzhàn zěnme zǒu?

I'm sorry to trouble you, but could you tell me the way to the station?

Tatoeba

不好意,你刚才说什么?

Bù hǎoyìsi, nǐ gāngcái shuō shénme?

I'm sorry, but I didn't catch what you said.

Character Family

Homophones — Characters pronounced

Frequently Asked Questions

What does 思 (sī) mean in Chinese?
思 (sī) primarily means "to think, thought." It is classified as HSK Level 2, making it a beginner-level character. It ranks #298 in character frequency.
How many strokes does 思 have?
思 is written with 9 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 思?
The radical associated with 思 is 心 (heart). This radical appears in many characters related to heart.
What are the components of 思?
思 is composed of: 田 (structural), 心 (structural). Its IDS decomposition is ⿱田心 with a top-bottom layout. Understanding the components helps with both memorization and recognizing related characters.
What are common words containing 思?
Common words with 思 include: 意思 (yì si, "idea"); 不好意思 (bù hǎo yì si, "to feel embarrassed"); 有意思 (yǒu yì si, "interesting"); 思考 (sī kǎo, "to reflect on"); 思想 (sī xiǎng, "thought"). There are over 100 compound words containing this character.
What characters sound the same as 思 (sī)?
Several characters share the pronunciation sī: 丝 (silk), 司 (to take charge of), 私 (personal), 斯 (Slovakia), and 6 more. Context and tones help distinguish between them in speech and writing.
Is 思 the same in simplified and traditional Chinese?
Yes, 思 is written the same way in both simplified and traditional Chinese.

Practice writing with real-time feedback

Trace stroke sequences, hear native 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.