| reserved(adjective, close, quiet, soft) |
| reticent(adjective, close, quiet, soft) |
| taciturn(adjective, close, quiet, soft) |
| secretive(adjective, close, quiet, soft) |
| quiet(adjective, close, soft, severe) |
| silent(adjective, close, quiet, soft) |
| uncommunicative(adjective, close, quiet, soft) |
| close(adjective, quiet, soft, severe) |
| mute(adjective, close, quiet, soft) |
| close-mouthed(adjective, close, quiet, soft) |
| dumb(adjective, close, quiet, soft) |
| speechless(adjective, close, quiet, soft) |
| buttoned up(expression, adjective, close, quiet, soft) |
| restrained(adjective, quiet, soft, reticent) |
| clammed up(expression, adjective, close, quiet, soft) |
| discreet(adjective, quiet, soft, restrained) |
| could hear a pin drop(expression, adjective, idiom, close, quiet) |
| hushed(adjective, close, quiet, soft) |
| hushful(adjective, close, quiet, soft) |
| inaudible(adjective, close, quiet, soft) |