Synonyms of keep one's mouth shut in English:

keep one's mouth shut


See definition of keep one's mouth shut

phrase

1

SYNONYMS
say nothing, keep quiet, not breathe a word, not tell a soul, not give the game away, keep it under one's hat
informal keep mum, keep one's cards close to one's chest, play one's cards close to one's chest, not let the cat out of the bag