塞 (sāi): to plug, to stop up, to stuff in, (bound form) a stopper, a cork, (bound form) strategic stronghold

塞 (sāi) is a Chinese character meaning “to plug.” Classified as HSK Level 6 (HSK 3.0 Standard, CLEC 2022), it is composed of 宀 (structural) and 土 (semantic). It ranks #1079 in character frequency (SUBTLEX-CH corpus).

Etymologically derived, 塞 earth. Its radical form 土 (earth) appears in many related characters such as 在 (zài, to exist), 地 (dì, earth, ground), 场 (chǎng, field, place).

Spoken pronunciation

Definitions

  1. to plug
  2. to stop up
  3. to stuff in
  4. (bound form) a stopper
  5. a cork
  6. (bound form) strategic stronghold

Etymology & Origin

塞

pictophoneticearth

Stroke Order

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

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

Words & Compounds

Common Compounds

WordPinyinMeaning
要塞nounyào sàistronghold
堵塞verbdǔ sèto clog up
哇塞interjectionwā sāi(slang) wow!
阻塞verbzǔ sèto block
活塞nounhuó sāipiston
塞车verbsāi chētraffic jam
斯宾塞sī bīn sài(name) Spencer
耳塞nouněr sāiearplug
巴塞罗那proper-nounbā sài luó nàBarcelona, Spain
布鲁塞尔proper-nounbù lǔ sài ěrBrussels, capital of Belgium
塞尔维亚sài ěr wéi yàSerbia
塞缪尔proper-nounsài miù ěr(name) Samuel
搪塞verbtáng sèto muddle through
栓塞verbshuān sè(medicine) embolism
塞族nounsài zúSerb ethnic group (abbr. for 塞爾維亞族|塞尔维亚族)
100
Total compounds
30
As first character
43
As last character
27
As middle character

塞 appears in 100 compound words: 30 as the first character, 43 as the last, and 27 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 塞 in natural Chinese text, ranked by NPMI (Normalized Pointwise Mutual Information) — a statistical measure of association strength.

疆jiāng
0.55211,212 co-occurrences
尔ěr
0.55161,832 co-occurrences
拜bài
0.52314,442 co-occurrences
堵dǔ
0.5085,327 co-occurrences
维wéi
0.50520,746 co-occurrences
亚yà
0.48625,548 co-occurrences
淤yū
0.4831,008 co-occurrences
畔pàn
0.4784,210 co-occurrences
栓shuān
0.4661,459 co-occurrences
萨sà
0.4669,252 co-occurrences

Idioms & Chengyu (23)

阿塞拜疆ĀsàibàijiāngHSK 7+

Azerbaijan (a country in the South Caucasus in Asia and Europe)

闭门塞窦bì mén sè dòu

to close doors and block openings (idiom); mounting a strict defense

phrase
闭目塞听bìmùsètīngHSK 6+

to be out of touch with reality

phrase
布鲁塞尔Bùlǔsài'ěrHSK 7+

Brussels (the capital city of Belgium)

敷衍塞责fūyǎnsèzéHSK 7+

to work halfheartedly; to go through the motions; to perform one's duty in a perfunctory manner

phrase
胡吃海塞húchīhǎisāiHSK 6+

to recklessly stuff oneself with food; gluttony

phrase
聊以塞责liáo yǐ sè zéHSK 6+

in order to minimally fulfill one's responsibilities; in order to get off the hook

phrase
马萨诸塞MǎsàzhūsàiHSK 7+

Massachusetts (a state of the United States); Massachusett

茅塞顿开máosèdùnkāiHSK 7+

to be enlightened all of a sudden; to come to the realization all of a sudden

phrase
塞尔维亚sài ěr wéi yàHSK 6+

Serbia; Taiwan pr.

phrase
塞哥维亚SègēwéiyàHSK 6+

Segovia

塞拉利昂Sàilālì'ángHSK 6+

Sierra Leone (a country in West Africa)

Showing 12 of 23 idioms containing 塞.

Example Sentences

AI-Generated

塞豆是东北地区的主要农作物之一。

sāi dòu shì dōng běi dì ōu de zhǔ yāo nóng zuò wù zhī yī .

Soybeans are one of the primary crops in Northeast China.

Hk01.comFeb 2026

西甲|巴塞隆拿中场法兰基迪庄受伤 将缺阵逾月 为欧...

xī jiǎ bā sāi lóng ná zhōng chǎng fǎ lán jī dí zhuāng shòu shāng jiāng quē zhèn yú yuè wéi ōu . . .

La Liga|Barcelona midfielder Frankie Di Zhuang is injured and will be out for more than a month.

StheadlineFeb 2026

西甲|巴塞正式启动买拉舒福特谈判 传欲压价 曼联企...

xī jiǎ bā sāi zhèng shì qǐ dòng mǎi lā shū fú tè tán pàn chuán yù yā jià 曼 lián qǐ . . .

La Liga|Barcelona officially launched negotiations to buy Rashford, rumored to be about to lower the price of Manchester United...

中時新聞網Feb 2026

台湾人看大陆》塞上古城宣化一日游

tái wān rén kàn dà lù sāi shàng gǔ chéng xuān huà yī rì yóu

Taiwanese people look at the mainland" A one-day trip to the ancient city of Xuanhua

StheadlineFeb 2026

...疯玩“热狗肠包X” 珍珠虾滑杨枝甘露乜都塞

. . . fēng wán rè gǒu cháng bāo X zhēn zhū xiā huá yáng zhī gān lù 乜 dōu sāi

... Crazy about playing "hot dog sausage bun X" pearl shrimp slippery poplar branch nectar stuffed with everything

UdnnewsindexFeb 2026

警察变毒贩 欧塞奎拉凶残难捉摸

jǐng chá biàn dú fàn ōu sāi 奎 lā xiōng cán nán zhuō mō

The police turned drug dealer Ossequira was brutal and elusive

Tatoeba

你想去瓦伦西亚还是巴塞罗那?

Nǐ xiǎng qù wǎ lún Xī Yà háishi Bāsàiluónà?

Do you want to go to Valencia or Barcelona?

Tatoeba

玛丽,你想学塞尔维亚语吗?

Mǎlì, nǐ xiǎng xué Sāi'ěrwéiyàyǔ ma?

Do you want to learn Serbian, Mary?

Tatoeba

秘书把信塞到一个信封里。

Mìshū bǎ xìn sāi dào yī gè xìnfēng lǐ.

The secretary stuffed the letter into an envelope.

Tatoeba

当我在塞勒姆的时候, 我常常和约翰打网球。

Dāng wǒ zài Sāilèmǔ de shíhou, wǒ chángcháng héyuē hàn dǎ wǎngqiú.

When I was in Salem, I would often play tennis with John.

Character Family

Semantic Family — Characters sharing the 土 (earth) component

Homophones — Characters pronounced sāi

Frequently Asked Questions

What does 塞 (sāi) mean in Chinese?
塞 (sāi) primarily means "to plug." It is classified as HSK Level 6, making it an advanced character. It ranks #1079 in character frequency.
What's the difference between 塞 and 下?
塞 (sāi) and 下 (xià) are often confused. antonym. The key distinguishing feature: 塞 (up) vs 下 (down).
How many strokes does 塞 have?
塞 is written with 13 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 塞?
The radical associated with 塞 is 土 (earth). This radical appears in many characters related to earth.
What are the components of 塞?
塞 is composed of: 宀 (structural), 土 (semantic). Understanding the components helps with both memorization and recognizing related characters.
What are common words containing 塞?
Common words with 塞 include: 要塞 (yào sài, "stronghold"); 堵塞 (dǔ sè, "to clog up"); 哇塞 (wā sāi, "(slang) wow!"); 阻塞 (zǔ sè, "to block"); 活塞 (huó sāi, "piston"). There are over 100 compound words containing this character.
What characters sound the same as 塞 (sāi)?
Several characters share the pronunciation sāi: 赛 (competition). Context and tones help distinguish between them in speech and writing.
Is 塞 the same in simplified and traditional Chinese?
Yes, 塞 is written the same way in both simplified and traditional Chinese.

Practice writing 塞 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.