Fluentide
HSK 3

mouth; opening; MW for people in a household

nounneutral
kǒu3rd tone

HSK level

1
2
3
4
5
6
Pinyin
kǒu
Part of speech
noun
Level
HSK 3
Strokes
3
Register
neutral
Measure word

Stroke order for 口

is written with 3 strokes. The animation replays automatically.

What does 口 mean?

(kǒu) has three main uses.

(1) As a body-part noun, it means 'mouth' — but in modern spoken Chinese, (zuǐ) is more common for the physical mouth, while appears mostly in compounds: 口红 (kǒuhóng, lipstick), 口语 (kǒuyǔ, spoken language), 口味 (kǒuwèi, taste / flavor preference). (2) As a noun meaning 'opening / entrance / mouth of a place,' it appears in 门口 (ménkǒu, doorway), 出口 (chūkǒu, exit), 入口 (rùkǒu, entrance), 路口 (lùkǒu, intersection), 港口 (gǎngkǒu, port).

(3) As a measure word, counts people in a household (我家有四口人 = my family has four people) and is also the measure word for a 'bite / mouthful' of food (一口饭 = a mouthful of rice) and for things like wells (一口井) and pigs (一口猪 — though 头 tóu is more common). The character is itself a pictograph of a mouth — a perfect square opening.

Note: Neutral. As a body part, the more common everyday word for 'mouth' is (zuǐ). is used in compounds (口语, 口味, 出口) and as a measure word.

Example sentences

我家有四口人。

Wǒ jiā yǒu sì kǒu rén.

There are four people in my family.

neutral

请在门口等我。

Qǐng zài ménkǒu děng wǒ.

Please wait for me at the doorway.

spoken

出口在哪儿?

Chūkǒu zài nǎr?

Where is the exit?

spoken

我吃了一口就饱了。

Wǒ chī le yì kǒu jiù bǎo le.

I had one bite and was full.

spoken

前面那个路口往左拐。

Qiánmiàn nàge lùkǒu wǎng zuǒ guǎi.

Turn left at the intersection up ahead.

spoken

Common phrases with 口

门口ménkǒudoorway; entrance
出口chūkǒuexit
入口rùkǒuentrance
路口lùkǒuintersection
几口人jǐ kǒu rénhow many people (in a household)

Synonyms

zuǐ

is the everyday spoken word for the physical mouth (张嘴 = open your mouth, 嘴巴 = mouth, casual). for the body part is more literary or used in fixed compounds (口红 lipstick, 口腔 oral cavity). When pointing at someone's actual mouth, say not .

Don't confuse 口 with

zuǐ

is the everyday mouth (body part); mostly survives in compounds and as a measure word. Don't say 我的口痛 for 'my mouth hurts' — say 我嘴痛 or 我的嘴疼.

huí

visually has inside it but means 'to return / time / a measure word for occurrences.' Different character; don't read as .

looks similar (a square with a line inside) and means 'sun / day.' has no line inside. Side by side: = mouth, = sun.

FAQ

Acquire it by listening

Meet 口 again — in real Chinese, at your level.

Fluentide turns real news into Chinese listening at your exact level, so words like 口 show up again and again in natural sentences — with pinyin and translation every time. No flashcards. Free to start.