| seared |
| seasoned(adjective, hard, unfeeling, unsympathetic, hardened) |
| shameless |
| solid |
| soulless(adjective, mean, hard, harsh, careless) |
| spiritless(adjective, hard, careless, indifferent, cruel) |
| steeled against |
| stiff(adjective, hard, careless, indifferent, cruel) |
| tactless(adjective, hard, indifferent, unsympathetic, unkind) |
| torpid(adjective, hard, careless, indifferent, cruel) |
| toughened(adjective, hard, careless, indifferent, cruel) |
| unaffected(adjective, hard, careless, indifferent, cruel) |
| unappealing(adjective, coldhearted) |
| unappeasable(adjective, mean, severe, harsh, cruel) |
| unashamed(adjective, hard, unfeeling, unsympathetic, hardened) |
| unbending(adjective, hard, careless, indifferent, cruel) |
| unblushing |
| uncalled-for(adjective, mean, severe, harsh, cruel) |
| unflinching(adjective, mean, severe, harsh, cruel) |
| unimpressionable(adjective, hard, careless, indifferent, cruel) |