close-mouthed /ˌkləʊs ˈmaʊðd◂, -ˈmaʊθt◂ $ ˌkloʊs-/ (
also closed mouthed /ˌkləʊzd- $ ˌkloʊzd-/
American English)
adjective not willing to say much because you are trying to keep a secret
Synonym : tight-lipped [TahlilGaran] Dictionary of Contemporary English ▲