| unrequited(adjective, calm, quiet, humble, silent) |
| antisocial(adjective, reserved, reticent, uncommunicative) |
| brief |
| brooding(adjective, reserved, reticent, uncommunicative) |
| cool(adjective, close, quiet, gentle, mild) |
| emotionless(adjective, cool, unfriendly, blank, aloof) |
| evasive(reserved, reticent, concealment) |
| glum(adjective, low, gloomy, miserable, depressed) |
| guarded(adjective, reserved, mysterious, private, reticent) |
| meek(adjective, calm, quiet, humble, silent) |
| not talkative(expression, quiet, still, reticent, silent) |
| pigeon-livered(adjective, calm, quiet, humble, silent) |
| remote(adjective, quiet, detached, thoughtful, unfriendly) |
| sedate(adjective, quiet, cool, unfriendly, blank) |
| shy(adjective, close, quiet, restrained, still) |
| solemn |
| sparing(adjective, reserved, reticent, uncommunicative) |
| standoffish(adjective, close, quiet, gentle, mild) |
| stern |
| taciturnity |