| coldblooded(adjective, careless, apathetic, unsympathetic, insensitive) |
| coldhearted(adjective, hard, unfeeling, unsympathetic, hardened) |
| cynical(adjective, hard, unfeeling, unsympathetic, hardened) |
| deaf |
| disdainful(adjective, hard, unfeeling, unsympathetic, hardened) |
| habituated(adjective, hard, unfeeling, unsympathetic, hardened) |
| hard-as-nails(adjective, hard, unfeeling, unsympathetic, hardened) |
| hard-nosed(adjective, hard, unfeeling, unsympathetic, hardened) |
| hard as nails(expression, adjective, idiom, callous, disciplined) |
| hardboiled(adjective, careless, cruel, apathetic, callous) |
| hermetical(unknowing, unbriefed) |
| hidden(unknowing, hermetical, unbriefed) |
| hot-headed(unknowing, hermetical, unbriefed) |
| ill-informed(unfamiliar, unaware, uninformed) |
| impassible |
| impenetrable(adjective, hard, unfeeling, unsympathetic, hardened) |
| imperceivable(unknowing, hermetical, unbriefed) |
| impervious to |
| impious(adjective, hard, unfeeling, unsympathetic, hardened) |
| in a corner(expression, idiom, unknowing, hermetical, unbriefed) |