| reticent(adjective, close, quiet, soft, low) |
| secretive(adjective, close, quiet, soft, low) |
| silent(adjective, close, quiet, soft, low) |
| soft(adjective, close, quiet, low, peaceful) |
| 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) |
| aghast(adjective, silent, dazed, dumb, amazed) |
| amazed(adjective, silent, dazed, dumb, astonished) |
| aphonic(adjective, silent, dazed, dumb, amazed) |
| astonished(thunderstruck, flabbergasted) |
| astounded(adjective, silent, dazed, dumb, amazed) |