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