| mousy(still, faint, unclear, hushed, soundless) |
| mum(still, hushed, soundless) |
| mute(still, hushed, soundless) |
| muted(still, hushed, soundless) |
| noiseless(still, hushed, soundless) |
| nonvocal(adjective, close, quiet, restrained, still) |
| not talkative(expression, adjective, close, quiet, restrained) |
| quiet speechless(expression, still, faint, unclear, hushed) |
| reserved(still, hushed, soundless) |
| restrained(still, hushed, soundless) |
| reticent(still, hushed, soundless) |
| silent(adjective, quiet, still, noiseless, hushed) |
| soundless(still, hushed) |
| still(hushed, soundless) |
| struck dumb(expression, adjective, close, quiet, restrained) |
| taciturn(still, hushed, soundless) |
| tongue-tied(still, hushed, soundless) |
| unclear(still, faint, hushed, soundless) |
| uncommunicative(still, hushed, soundless) |
| unheard(adjective, still, faint, unclear, silent) |