shut one's mouth

1. 1.

   refrain from divulging sensitive information; keep quiet about confidential information

   “Don't tell him any secrets--he cannot keep his mouth shut!”

   Synonymskeep quietkeep one's mouth shut

Questions about shut one's mouth

What does shut one's mouth mean?

shut one's mouth means "refrain from divulging sensitive information; keep quiet about confidential information".

What is another word for shut one's mouth?

Close synonyms include keep quiet, keep one's mouth shut. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is shut one's mouth a common word?

shut one's mouth is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.