closemouthed

1 given to keeping one's activities hidden from public observation or knowledge he remained closemouthed about their activities Synonyms close, secretive, dark, reticent, tight-mouthed, uncommunicativeRelated Words quiet, reserved, silent, taciturn, tight-lipped; discreet, prudent; clandestine, covert, furtive, hugger-mugger, secret, sneak, sneaky, stealthy, surreptitious, undercover, underhand, underhandedNear Antonyms candid, frank, honest, out-front, up-front; blunt, outspoken, tactlessAntonyms communicative, open

2 tending not to speak frequently (as by habit or inclination) encourage the closemouthed children to speak up and not be shy Synonyms silent, dumb, laconic, reserved, reticent, taciturn, tight-lipped, uncommunicativeRelated Words aloof, indrawn, inhibited, introverted, reserved, restrained; sedate, self-contained, sober, staid; backward, bashful, coy, demure, diffident, modest, retiring, self-effacing, sheepishNear Antonyms free-spoken, outspoken, vocal; gossipy, talebearing; diffuse, long-winded, prolix, rambling, verbose, windy, wordy; extroverted (also extraverted), gregarious, outgoing, sociableAntonyms blabby, chatty, communicative, conversational, gabby, garrulous, loquacious, motormouthed, mouthy, talkative, talky, unreserved