| mum(adjective, quiet, soft, still) |
| silent(adjective, close, quiet, soft) |
| closemouthed(quiet, soft, still, shy) |
| faint(quiet, soft, still, silent) |
| hushed(adjective, close, quiet, soft) |
| inaudible(adjective, quiet, soft, still) |
| mute(quiet, soft, still, silent) |
| muted(quiet, soft, still, shy) |
| noiseless(quiet, soft, still, silent) |
| not talkative(expression, adjective, close, quiet, soft) |
| quiet(soft, still, shy, silent) |
| soundless(quiet, soft, still, shy) |
| still(quiet, soft, silent, hushed) |
| unclear(quiet, soft, still, hushed) |
| uncommunicative(quiet, soft, still, shy) |
| voiceless(quiet, soft, still, shy) |
| wordless(adjective, close, quiet, soft) |
| imperceptible(quiet, soft) |
| muffled(quiet, soft) |
| mumbled(quiet, soft) |