吸 (xī): to breathe, to suck in, to absorb

吸 (xī) is a Chinese character meaning “to breathe.” Classified as HSK Level 4 (HSK 3.0 Standard, CLEC 2022), it is composed of 口 (semantic) and 及 (phonetic). It ranks #924 in character frequency (SUBTLEX-CH corpus).

Etymologically derived, 吸 mouth. Its radical form 口 (mouth) appears in many related characters such as 口 (kǒu, mouth), 叫 (jiào, to call, to be called), 右 (yòu, (bound form) right).

Spoken pronunciation

Definitions

  1. to breathe
  2. to suck in
  3. to absorb

Etymology & Origin

吸

pictophoneticmouth

Decomposition: ⿰口及 (layout: left-right)

Stroke Order

1
2
3
4
5
6

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

Words & Compounds

HSK Vocabulary with 吸

WordPinyinMeaningHSK
呼吸verbhū xīto breathe5
吸引verbxī yǐnto attract4
吸收verbxī shōuto absorb5
吸取verbxī qǔto absorb6
吸管nounxī guǎn(drinking) straw5

Common Compounds

WordPinyinMeaning
吸血鬼nounxī xuè guǐleech
吸毒verbxī dúto take drugs
深呼吸shēn hū xīto take a deep breath
吸烟verbxī yānto smoke
吸引力nounxī yǐn lìattractive force (such as gravitation)
吸食verbxī shí(of an insect) to drink (nectar, sap, blood etc)
吸气verbxī qìto inhale
吸尘器nounxī chén qìvacuum cleaner
呼吸器nounhū xī qì(medicine) ventilator
人工呼吸nounrén gōng hū xīartificial respiration (medicine)
呼吸道nounhū xī dàorespiratory tract
吸吮verbxī shǔnto suck on (sth)
吮吸verbshǔn xīto suck
吸力nounxī lì(physics) attractive force (gravitational, magnetic, electrostatic etc)
吸热verbxī rèheat absorption
100
Total compounds
64
As first character
12
As last character
24
As middle character

吸 appears in 100 compound words: 64 as the first character, 12 as the last, and 24 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 吸 in natural Chinese text, ranked by NPMI (Normalized Pointwise Mutual Information) — a statistical measure of association strength.

引yǐn
0.61771,057 co-occurrences
呼hū
0.61126,046 co-occurrences
鬼guǐ
0.60215,210 co-occurrences
血xiě
0.59121,468 co-occurrences
收shōu
0.58643,494 co-occurrences
烟yān
0.4762,527 co-occurrences
虫chóng
0.4581,890 co-occurrences
毒dú
0.4535,530 co-occurrences
竭jié
0.417722 co-occurrences
酗xù
0.398210 co-occurrences

Idioms & Chengyu (5)

呼吸系统hūxī xìtǒngHSK 5+

respiratory system

noun
人工呼吸réngōng hūxīHSK 4+

artificial respiration

noun
吸收剂量xī shōu jì liàngHSK 7+

absorbed dose

phrase
血吸虫病xuèxīchóngbìngHSK 5+

schistosomiasis

noun

Showing 4 of 5 idioms containing 吸.

Example Sentences

AI-Generated

深呼吸可以帮助你放松身心,缓解压力。

Shēn hūxī kěyǐ bāngzhù nǐ fàngsōng shēnxīn, huǎnjiě yālì.

Deep breathing can help you relax your body and mind and relieve stress.

Orientaldaily MyFeb 2026

槟城庙会“解码之旅” 吸引约20万人参与

槟 chéng miào huì jiě mǎ zhī lǚ xī yǐn yuē wàn rén cān yǔ

Penang Temple Fair "Decoding Journey" Attracts Approximately 200,000 Participants

StheadlineFeb 2026

港大團隊發現新物理原理 破解「通風與吸音」矛盾難題

gǎng dà 團 隊 發 現 xīn wù lǐ yuán lǐ pò jiě tōng 風 與 xī yīn máo dùn 難 題

HKU Team Discovers New Physical Principle, Solving the Paradox Between Ventilation and Sound Absorption

StheadlineFeb 2026

港大發現新物理原理 突破通風吸音材料極限

gǎng dà 發 現 xīn wù lǐ yuán lǐ tū pò tōng 風 xī yīn cái liào 極 xiàn

HKU Discovers New Physical Principle, Pushing Boundaries of Ventilated Sound-Absorbing Materials

StheadlineFeb 2026

TVB視帝黃宗澤晒童年照吸引4千萬人圍觀 6歲潮男Chok樣曝光獲...

視 dì 黃 zōng 澤 shài tóng nián zhào xī yǐn qiān 萬 rén 圍 觀 歲 cháo nán 樣 pù guāng 獲 . . .

TVB star Wong Chung Chak's childhood photo attracts 40 million viewers...

Yahoo FinanceFeb 2026

惠理:金價跌返4900水平可吸

huì lǐ jīn 價 diē fǎn shuǐ píng kě xī

Wheatley:Gold price drop back to 4900 level can be absorbed

Tatoeba

珍比苏珊更吸引人。

Zhēn bǐ Sūshān gèng xīyǐn rén.

Jane is more attractive than Susan.

Tatoeba

主妇给地毯吸了尘。

Zhǔfù gěi dìtǎn xī le chén.

The homemaker vacuumed the carpet.

Tatoeba

汤姆讨厌在禁烟区吸烟的人。

Tāngmǔ tǎoyàn zài jìnyānqū xīyān de rén.

Tom doesn't like people who smoke in no smoking areas.

Tatoeba

你能屏住呼吸多久?

Nǐ néng bīng zhù hūxī duōjiǔ?

How long can you hold your breath?

Character Family

Semantic Family — Characters sharing the 口 (mouth) component

Homophones — Characters pronounced xī

Frequently Asked Questions

What does 吸 (xī) mean in Chinese?
吸 (xī) primarily means "to breathe." It is classified as HSK Level 4, making it an upper-intermediate character. It ranks #924 in character frequency.
What's the difference between 吸 and 极?
吸 (xī) and 极 (jí) are often confused. confusable. The key distinguishing feature: 口 vs 木 (same 及 component).
How many strokes does 吸 have?
吸 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 吸?
The radical associated with 吸 is 口 (mouth). This radical appears in many characters related to mouth.
What are the components of 吸?
吸 is composed of: 口 (semantic), 及 (phonetic). Its IDS decomposition is ⿰口及 with a left-right layout. Understanding the components helps with both memorization and recognizing related characters.
What are common words containing 吸?
Common words with 吸 include: 呼吸 (hū xī, "to breathe"); 吸血鬼 (xī xuè guǐ, "leech"); 吸引 (xī yǐn, "to attract"); 吸毒 (xī dú, "to take drugs"); 深呼吸 (shēn hū xī, "to take a deep breath"). There are over 100 compound words containing this character.
What characters sound the same as 吸 (xī)?
Several characters share the pronunciation xī: 西 (the West), 系 (to connect), 息 (breath), 希 (to hope), and 2 more. Context and tones help distinguish between them in speech and writing.
Is 吸 the same in simplified and traditional Chinese?
Yes, 吸 is written the same way in both simplified and traditional Chinese.

Practice writing 吸 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.