| soulless(adjective, hard, unfeeling, unsympathetic, hardened) |
| spiritless(adjective, hard, unfeeling, unsympathetic, hardened) |
| stiff(adjective, hard, unfeeling, unsympathetic, hardened) |
| stoical(adjective, callous, unexcitable) |
| stony(adjective, hard, unfeeling, unsympathetic, hardened) |
| tactless(unsympathetic, obtuse) |
| torpid(adjective, hard, unfeeling, unsympathetic, hardened) |
| tough(adjective, hard, unfeeling, unsympathetic, hardened) |
| unaffected(adjective, hard, unfeeling, unsympathetic, hardened) |
| unconcerned(adjective, hard, unfeeling, unsympathetic, hardened) |
| unexcitable(adjective, callous) |
| unimpressible(adjective, callous, unexcitable) |
| unimpressionable(adjective, hard, unfeeling, unsympathetic, hardened) |
| unresponsive(adjective, hard, unfeeling, unsympathetic, hardened) |
| unsentimental(adjective, toughened, cynical, hard-boiled, hard-bitten) |
| unsusceptible(adjective, hard, unfeeling, unsympathetic, hardened) |
| unsympathetic(adjective, hard, unfeeling, hardened, toughened) |
| untiring |