| bashful(quiet, shy, silent, tight-lipped) |
| buttoned up(expression, quiet, shy, silent, tight-lipped) |
| clammed up(expression, quiet, shy, silent, tight-lipped) |
| nonvocal(quiet, shy, silent, tight-lipped) |
| not talkative(expression, quiet, shy, silent, tight-lipped) |
| secretive(quiet, shy, silent, tight-lipped) |
| tight-lipped(quiet, shy, silent) |
| tongue-tied(quiet, shy, silent, tight-lipped) |
| unsociable(quiet, shy, silent, tight-lipped) |
| unspeaking(quiet, shy, silent, tight-lipped) |
| zipped(quiet, shy, silent, tight-lipped) |
| cagey |
| closemouthed(quiet, shy, silent, tight-lipped) |
| hushed(quiet, shy, silent, tight-lipped) |
| mum(adjective, silent) |
| muted(quiet, shy, silent, tight-lipped) |
| quiet(shy, silent, tight-lipped) |
| reserved(quiet, shy, silent, tight-lipped) |
| soundless(quiet, shy, silent, tight-lipped) |
| uncommunicative(quiet, shy, silent, tight-lipped) |