口
kǒu
In real, traceable use. Part of the curated seed collection; community review is coming.
A measure word for the people in a family, and the word for 'mouth'. For people it counts only the members of a household: 我家有三口人 'there are three of us at home'; other people take 个. It also counts mouthfuls: 喝一口水 'take a sip of water'.
Lượng từ đếm người trong một nhà; ngoài ra còn có nghĩa là “miệng”. Với người, chỉ dùng khi đếm người trong gia đình: 我家有三口人 (nhà tôi có ba người); người nói chung thì dùng 个. Còn dùng để đếm ngụm, miếng: 喝一口水 (uống một ngụm nước).
ClassifierRegister: neutral
Examples
Editorial example (illustrative, not a corpus attestation) — awaiting a native-speaker check
Sources & notes
Hán-Việt bridge batch 064 (2026-11-14). Headword, Traditional form and pinyin checked against CC-CEDICT (CC BY-SA 4.0) source ↗ · Hán-Việt reading: Unihan kVietnamese source ↗ · No Vietnamese entry is linked as its twin; the Hán-Việt reading is given character by character. Definition, literal gloss and example sentence are original; the example has not had a native-speaker check yet.
Common questions
What does “口” mean?
A measure word for the people in a family, and the word for 'mouth'. For people it counts only the members of a household: 我家有三口人 'there are three of us at home'; other people take 个. It also counts mouthfuls: 喝一口水 'take a sip of water'.
Is “口” formal or informal?
口 is generally neutral.