| buttoned up(expression, careful, reticent, ambiguous) |
| clammed up(expression, careful, reticent, ambiguous) |
| secretive(adjective, quiet, mysterious, private) |
| bashful(quiet, still, silent, hushed) |
| closemouthed(quiet, still, reticent, silent) |
| hushed(quiet, still, mysterious, reticent) |
| muted(quiet, still, reticent, silent) |
| nonvocal(quiet, still, silent, hushed) |
| not forthcoming(expression, quiet, silent, tight-lipped) |
| not talkative(expression, quiet, still, reticent) |
| reserved(careful, reticent, ambiguous, taciturn) |
| soundless(quiet, still, silent, hushed) |
| tight-lipped(adjective, quiet, mysterious, reticent) |
| tongue-tied(quiet, still, reticent, silent) |
| uncommunicative(quiet, still, mysterious, private) |
| unsociable(quiet, still, silent, hushed) |
| unspeaking(quiet, still, silent, hushed) |
| voiceless(quiet, still, silent, hushed) |
| quiet(still, reticent, silent, hushed) |