守口如瓶
shǒu kǒu rú píng
In real, traceable use. Part of the curated seed collection; community review is coming.
To keep completely silent about something, like a bottle with its cork pushed in. Used for someone who can be trusted with a secret, or who refuses to reveal anything however much they are asked.
Giữ miệng kín như cái bình đậy nút: tuyệt đối không hé lộ điều gì. Dùng cho người biết giữ bí mật hoặc nhất quyết không tiết lộ dù bị hỏi thế nào.
Register: neutral
Examples
Editorial example (illustrative, not a corpus attestation) — awaiting a native-speaker check
Sources & notes
Hán-Việt bridge batch 062 (2026-11-13). Headword, Traditional form and pinyin checked against CC-CEDICT (CC BY-SA 4.0) source ↗ · Hán-Việt reading: Unihan kVietnamese source ↗ ; en.wiktionary Vietnamese entries via kaikki.org extract, snapshot 2026-07-31 (CC BY-SA 4.0): Hán-Việt reading 守 = thủ · Vietnamese cognate: Idiomer entry “thủ khẩu như bình” (thu-khau-nhu-binh). Definition, literal gloss and example sentence are original; the example has not had a native-speaker check yet.
Equivalents & related
Common questions
What does “守口如瓶” mean?
To keep completely silent about something, like a bottle with its cork pushed in. Used for someone who can be trusted with a secret, or who refuses to reveal anything however much they are asked. Literally: a mouth kept as tight as a bottle
Is “守口如瓶” formal or informal?
守口如瓶 is generally neutral.