| soundless(adjective, close, quiet, soft, low) |
| speechless(adjective, close, quiet, soft, low) |
| still(adjective, close, quiet, soft, low) |
| stilled(adjective, close, quiet, soft, low) |
| taciturn(adjective, close, quiet, soft, low) |
| tight-lipped(adjective, close, quiet, soft, low) |
| uncommunicative(adjective, close, quiet, soft, low) |
| unexpressed(adjective, close, quiet, soft, low) |
| unspeaking(adjective, close, quiet, soft, low) |
| unuttered(adjective, close, quiet, soft, low) |
| whist(adjective, close, quiet, soft, low) |
| close(adjective, quiet, soft, low, peaceful) |
| close-mouthed(adjective, close, quiet, soft, low) |
| dumb(adjective, close, quiet, soft, low) |
| hushful(adjective, close, quiet, soft, low) |
| at ease(expression, silenced, whist, disimpassioned) |
| composed(silenced, whist, disimpassioned) |
| cool as cucumber(expression, idiom, silenced, whist, disimpassioned) |
| discreet(adjective, soft, low, silent, noiseless) |
| disimpassioned(silenced, whist) |