| stolid(adjective, dull, dead, impassive, unresponsive) |
| uncommunicative(aloof, reserved, reticent) |
| vacuous(adjective, dull, indifferent, dead, blank) |
| wooden(adjective, dull, dead, impassive, unresponsive) |
| aloof(reserved, reticent, dour, uncommunicative) |
| antisocial(aloof, reserved, reticent, dour, uncommunicative) |
| brooding(aloof, reserved, reticent, dour, uncommunicative) |
| clammed up(expression, aloof, reserved, reticent, uncommunicative) |
| close(aloof, reserved, reticent, uncommunicative) |
| close-mouthed(aloof, reserved, reticent, uncommunicative) |
| cold(aloof, reserved, reticent, dour, uncommunicative) |
| curt(aloof, reserved, reticent, dour, uncommunicative) |
| distant(aloof, reserved, reticent, uncommunicative) |
| dour(aloof, reserved, reticent, uncommunicative) |
| dried-up(aloof, reserved, reticent, dour, uncommunicative) |
| dumb(aloof, reserved, reticent, dour, uncommunicative) |
| fish-eyed(adjective, dull, dead, impassive, unresponsive) |
| fishy |
| glassy |
| ineffable |