突 (tū): sudden

突 (tū) is a Chinese character meaning “sudden.” Classified as HSK Level 3 (HSK 3.0 Standard, CLEC 2022), it is composed of 穴 (structural) and 犬 (structural). It ranks #484 in character frequency (SUBTLEX-CH corpus).

Etymologically derived, 突 a dog 犬 rushing out of a cave 穴. Its radical form 穴 (cave) appears in many related characters such as 穿 (chuān, to wear, 穿透), 空 (kōng, empty, sky), 究 (jiū, research).

Spoken pronunciation

Definitions

  1. sudden

Etymology & Origin

突

ideographicA dog 犬 rushing out of a cave 穴

Decomposition: ⿱穴犬 (layout: top-bottom)

Stroke Order

1
2
3
4
5
6
7
8
9

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

Words & Compounds

HSK Vocabulary with 突

WordPinyinMeaningHSK
突然adjectivetū ránsudden3
冲突verbchōng tūconflict6
突破verbtū pòto break through6
突出verb/adjectivetū chūprominent5
突发verbtū fāto occur suddenly6

Common Compounds

WordPinyinMeaning
突击verbtū jīsudden and violent attack
突袭verbtū xíto raid
突击队nountū jī duìcommando unit
突变verbtū biànsudden change
唐突adjectivetáng tūto be rude
突破口nountū pò kǒubreach
突如其来phrasetū rú qí láito arise abruptly
突围verbtū wéito break a siege
突起verbtū qǐto appear suddenly
突破点tū pò diǎnpoint of penetration (military)
突破性nountū pò xìnggroundbreaking
突尼斯proper-nountū ní sīTunisia
突飞猛进phrasetū fēi měng jìnto advance by leaps and bounds
突显verbtū xiǎnconspicuous
突兀adjectivetū wùlofty
74
Total compounds
50
As first character
28
As last character
22
As middle character

突 appears in 74 compound words: 50 as the first character, 28 as the last, and 22 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 突 in natural Chinese text, ranked by NPMI (Normalized Pointwise Mutual Information) — a statistical measure of association strength.

冲chōng
0.63340,165 co-occurrences
破pò
0.62557,319 co-occurrences
然rán
0.51865,758 co-occurrences
击jī
0.44611,046 co-occurrences
贡gòng
0.4393,248 co-occurrences
袭xí
0.4316,915 co-occurrences
兀wù
0.429768 co-occurrences
围wéi
0.4216,314 co-occurrences
出chū
0.41348,240 co-occurrences
肢zhī
0.3981,268 co-occurrences

Idioms & Chengyu (12)

基罗米突jīluómǐtūHSK 7+

kilometre (unit of length)

基因突变jīyīn tūbiànHSK 4+

gene mutation; genetic mutation

noun
曲突徙薪qūtūxǐxīnHSK 7+

to take preventive measures; to take precautions (to prevent trouble from happening)

phrase
突发奇想tūfāqíxiǎngHSK 3+

to suddenly come up with an ingenious idea; to suddenly be inspired to do something

phrase
突飞猛进tūfēiměngjìnHSK 7+

to progress rapidly; leaps and bounds

phrase
突击检查tū jī jiǎn cháHSK 6+

sudden unannounced investigation; on-the-spot inspection; to search without notification

phrase
突厥斯坦Tūjuésītǎn

Turkestan (a historic region of Asia); Turkistan (a region of Kazakhstan)

突尼西亚TūníxīyàHSK 7+

Tunisia (a country in North Africa)

突破瓶颈tū pò píng jǐngHSK 6+

to make a breakthrough

phrase
突如其来tūrúqíláiHSK 3+

sudden; suddenly; abrupt; abruptly

phrase
异军突起yìjūntūqǐHSK 6+

a new force suddenly emerges

phrase
狼奔豕突láng bēn shǐ tūHSK 6+

the wolf runs and the wild boar rushes (idiom); crowds of evil-doers mill around like wild beasts

phrase

Example Sentences

AI-Generated

突然下起了大雨,我们只好躲在商店门口避雨。

Tūrán xià qǐ le dàyǔ, wǒmen zhǐhǎo duǒ zài shāngdiàn ménkǒu bìyǔ.

It suddenly started raining heavily, so we had to take shelter at the shop entrance.

中国新闻网_梳理天下新闻Feb 2026

(米兰冬奥会)惊喜与突破交织 中国冰雪向新而行

( mǐ lán dōng ào huì ) jīng xǐ yǔ tū pò jiāo zhī zhōng guó bīng xuě xiàng xīn ér háng

(Milan Winter Olympics) Surprises and breakthroughs are intertwined, and China's ice and snow are moving towards the new

百度新闻Feb 2026

新春走基层丨国网株洲供电公司党员突击队护航春节绿色..

xīn chūn zǒu jī céng 丨 guó wǎng zhū zhōu gōng diàn gōng sī dǎng yuán tū jī duì hù háng chūn jié lǜ sè . .

New Year to the grassroots丨State Grid Zhuzhou Power Supply Company party member commando escorts the Spring Festival green:

百度新闻Feb 2026

冬奥会|全天综合:中国速滑再迎突破 中井亚美领跑花..

dōng ào huì quán tiān zèng gě zhōng guó sù huá zài yíng tū pò zhōng jǐng yà měi lǐng pǎo huā . .

Winter Olympics|All Day Roundup: China's speed skating breaks through again, and Ami Nakai leads the way in flower...

百度新闻Feb 2026

...丽一起“搭戏”的机器人,还藏着这样的技术突..

. . . lí yī qǐ dā xì de jī qì rén , hái zàng zhe zhè yàng de jì shù tū . .

...the robot that co-starred with Li also hides such technological breakthroughs...

百度新闻Feb 2026

突发:一男子手持霰弹枪冲向美国国会大厦

tū fā yī nán zǐ shǒu chí 霰 dàn qiāng chōng xiàng měi guó guó huì dà xià

Breaking: Man Charged Toward U.S. Capitol Building with Shotgun

Tatoeba

蛋糕?我突然又饿了!

Dàngāo? wǒ tūrán yòu è le!

Cake? I'm suddenly hungry again.

Tatoeba

外交谈判帮助结束了冲突。

Wàijiāo tánpàn bāngzhù jiéshù le chōngtū.

Diplomatic dialogue helped put an end to the conflict.

Tatoeba

她得知父亲突然离世,不禁心如刀割。

Tā dézhī fùqīn tūrán líshì, bù jìn xīnrúdāogē.

She was filled with deep grief to hear of her father's sudden death.

Tatoeba

我突然肚痛得要命。

Wǒ tūrán dùtòng děiyào mìng.

All of a sudden, I felt a sharp pain in my stomach.

Character Family

Homophones — Characters pronounced tū

Frequently Asked Questions

What does 突 (tū) mean in Chinese?
突 (tū) primarily means "sudden." It is classified as HSK Level 3, making it a beginner-level character. It ranks #484 in character frequency.
How many strokes does 突 have?
突 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 突?
The radical associated with 突 is 穴 (cave). This radical appears in many characters related to cave.
What are the components of 突?
突 is composed of: 穴 (structural), 犬 (structural). Its IDS decomposition is ⿱穴犬 with a top-bottom layout. Understanding the components helps with both memorization and recognizing related characters.
What are common words containing 突?
Common words with 突 include: 突然 (tū rán, "sudden"); 冲突 (chōng tū, "conflict"); 突破 (tū pò, "to break through"); 突出 (tū chū, "prominent"); 突发 (tū fā, "to occur suddenly"). There are over 74 compound words containing this character.
What characters sound the same as 突 (tū)?
Several characters share the pronunciation tū: 图 (diagram), 土 (earth, soil), 途 (way, journey), 徒 ((bound form) disciple), and 6 more. Context and tones help distinguish between them in speech and writing.
Is 突 the same in simplified and traditional Chinese?
Yes, 突 is written the same way in both simplified and traditional Chinese.

Practice writing 突 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.