tight lipped[adjective]Synonyms: silent, close, close-lipped, closemouthed, close-tongued, reserved, reticent, taciturn, tight-mouthed, uncommunicative
Related Idioms: with one's lips sealed
[TahlilGaran] English Synonym Dictionary ▲
tight-lipped /ˌtaɪt ˈlɪpt◂/
adjective1. unwilling to talk about something:
Diplomats are remaining tight-lipped about the negotiations.2. with your lips tightly pressed together because you are angry
[TahlilGaran] Dictionary of Contemporary English ▲