/ Thesaurus / K Synonyms of keep quiet Find synonyms for: Verb1. keep quiet, shut one's mouth, keep one's mouth shutusage: refrain from divulging sensitive information; keep quiet about confidential information; "Don't tell him any secrets--he cannot keep his mouth shut!"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: devout Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language