| reserved(adjective, close, quiet, soft, low) |
| reticent(adjective, close, quiet, soft, low) |
| taciturn(adjective, close, quiet, soft, low) |
| mum(adjective, quiet, restrained, aloof, reserved) |
| secretive(adjective, close, quiet, soft, low) |
| quiet(adjective, close, soft, severe, low) |
| silent(adjective, close, quiet, soft, low) |
| uncommunicative(adjective, close, quiet, soft, low) |
| close(adjective, quiet, soft, severe, low) |
| mute(adjective, close, quiet, soft, low) |
| close-mouthed(adjective, close, quiet, soft, low) |
| closemouthed(adjective, quiet, shy, reserved, secret) |
| dumb(adjective, close, quiet, soft, low) |
| curt(adjective, aloof, reserved, reticent, taciturn) |
| speechless(adjective, close, quiet, soft, low) |
| unforthcoming(adjective, quiet, restrained, aloof, reserved) |
| buttoned up(expression, adjective, close, quiet, soft) |
| close-lipped(adjective, quiet, reserved, secret, private) |
| laconic(aloof, reserved, reticent, uncommunicative) |
| tongue-tied(adjective, quiet, shy, reticent, silent) |