| thick-skinned(noun, adjective, hard, tough, severe) |
| unthinking(adjective, dull, thoughtless, unintelligent, witless) |
| anesthetic(adjective, attitude, feelings) |
| apathetic(adjective, hard, tough, severe, careless) |
| frenzied |
| iron-hearted(adjective, bad, hard, tough, severe) |
| mad |
| numbed(adjective, dead, unfeeling, lifeless, numb) |
| obtuse(noun, adjective, dull, hard, simple) |
| stupid(adjective, dull, simple, slow, silly) |
| thoughtless |
| unkind(adjective, bad, hard, tough, severe) |
| unresponsive(adjective, bad, hard, careless, cold) |
| unsympathetic(adjective, bad, hard, tough, severe) |
| azoic(dull, cold, lifeless, nonliving, inorganic) |
| bloodless(adjective, attitude, feelings) |
| coldhearted(adjective, hard, severe, unfeeling, unsympathetic) |
| emotionless(adjective, bad, cold, aloof, no feelings) |
| exanimate(dull, cold, lifeless, nonliving, inorganic) |
| frigid |