| thick-skinned(noun, adjective, hard, tough, severe) |
| tough(noun, adjective, hard, severe, cruel) |
| unresponsive(adjective, dull, quiet, flat, heavy) |
| unsympathetic(adjective, dull, quiet, hard, tough) |
| anesthetic |
| calm(adjective, still, lifeless, inactive, inert) |
| chloroform(verb, dull, quiet, diminish, abate) |
| dispassionate(adjective, insensitive, unexcitable) |
| dope(verb, dull, quiet, drug, diminish) |
| hard-boiled(noun, adjective, insensitive) |
| hardhearted(adjective, cruel, unsympathetic, pitiless, insensitive) |
| incurious(adjective, unfeeling, insensitive, under, asleep) |
| objective(adjective, insensitive) |
| oblivious(adjective, cold, indifferent, senseless, unresponsive) |
| ruthless(adjective, hard, tough, severe, cold) |
| stoical(adjective, unexcitable) |
| stony(adjective, hard, tough, severe, cruel) |
| stunned(adjective, cold, senseless, insensible, dazed) |
| stuporous(adjective, dull, quiet, flat, heavy) |
| swooning(adjective, cold, senseless, insensible, comatose) |