| reserved(adjective, close, quiet, cool, soft) |
| silent(adjective, calm, close, quiet, soft) |
| reticent(adjective, close, quiet, cool, soft) |
| close-mouthed(adjective, close, quiet, soft, low) |
| uncommunicative(adjective, close, quiet, soft, low) |
| mute(adjective, close, quiet, soft, low) |
| tight-lipped(adjective, close, quiet, soft, low) |
| speechless(adjective, calm, close, quiet, soft) |
| quiet(adjective, close, soft, low, restrained) |
| mum(adjective, close, quiet, restrained, still) |
| close(adjective, quiet, soft, low, restraint) |
| dumb(adjective, calm, close, quiet, soft) |
| secretive(adjective, close, quiet, soft, low) |
| tacit(adjective, speechless) |
| curt(adjective, reserved, reticent, uncommunicative, taciturnity) |
| voiceless(adjective, quiet, still, silent, dumb) |
| aloof(adjective, close, quiet, cool, unfriendly) |
| incommunicative(adjective, quiet, restraint, sounds, tightlipped) |
| laconic(adjective, still, reserved, reticent, hushed) |
| wordless(adjective, calm, quiet, humble, silent) |