| bashful(quiet, soft, restrained, still, shy) |
| brooding(aloof, reserved, reticent, uncommunicative) |
| cagey(quiet, restrained, mysterious, private, reticent) |
| calm(verb, adjective, quiet, smooth, subdue) |
| cautious(careful, vague, mysterious, wary, ambiguous) |
| checked(quiet, soft, still, silent, hushed) |
| clam up(expression, close, quiet, gag, quieten) |
| clamming up(expression, close, quiet, reticent, gag) |
| closed(adjective, calm, quiet, smooth, tranquil) |
| closed up(verb, expression, adjective, close, quiet) |
| closemouthed(adjective, quiet, soft, still, shy) |
| cold(aloof, reserved, reticent, uncommunicative) |
| could hear a pin drop(expression, adjective, idiom, close, quiet) |
| covert(mysterious, private, reticent, taciturn, uncommunicative) |
| cryptic(mysterious, private, reticent, taciturn, uncommunicative) |
| curbed(quiet, soft, still, silent, hushed) |
| curt(aloof, reserved, reticent, taciturn, uncommunicative) |
| deathlike(adjective, calm, quiet, smooth, tranquil) |
| deathly(adjective, calm, quiet, smooth, tranquil) |
| deathly quiet(expression, adjective, calm, quiet, smooth) |