| tough(adjective, insensitive) |
| unmotivated |
| blase(indifferent, apathetic) |
| bloodthirsty(adjective, aroused negative) |
| cat-hearted(adjective, bad behavior, aroused negative) |
| clinical(adjective, detached, dispassionate) |
| coldhearted(adjective, detached, unfeeling, impassive, unresponsive) |
| controlled |
| expressionless(adjective, blank, impassive, unemotional, inexpressive) |
| frosty(adjective, cool, detached, hostile, unfriendly) |
| impassible(adjective, bad, cold, aloof, no feelings) |
| inexcitable(adjective, cool, blank, aloof, unemotional) |
| insensate(adjective, bad, cold, aloof, no feelings) |
| insusceptible(adjective, cool, blank, aloof, unemotional) |
| iron-hearted(adjective, bad, cold, aloof, no feelings) |
| lackadaisical(adjective, indifferent, apathetic) |
| laconic(adjective, ironic, deadpan, understated, wry) |
| mechanical(adjective, done, powered, motorized, power-driven) |
| restrained(adjective, ironic, deadpan, understated, laconic) |
| rocky |