| mute(adjective, close, quiet, soft, low) |
| buttoned up(expression, adjective, close, quiet, soft) |
| clammed up(expression, adjective, close, quiet, soft) |
| quiet(adjective, close, soft, low, restrained) |
| bashful(adjective, quiet, restrained, still) |
| closemouthed(adjective, quiet, still, silent) |
| hushed(adjective, close, quiet, soft, low) |
| muted(adjective, close, quiet, soft, low) |
| nonvocal(adjective, close, quiet, restrained, still) |
| not forthcoming(expression, adjective, quiet, silent) |
| not talkative(expression, adjective, close, quiet, restrained) |
| reserved(adjective, close, quiet, soft, low) |
| secretive(adjective, close, quiet, soft, low) |
| soundless(adjective, close, quiet, soft, low) |
| speechless(adjective, close, quiet, soft, low) |
| still(adjective, close, quiet, soft, low) |
| tight-lipped(adjective, close, quiet, soft, low) |
| tongue-tied(adjective, quiet, still, silent) |
| uncommunicative(adjective, close, quiet, soft, low) |
| unsociable(adjective, quiet, still, silent) |