| unbending(adjective, hard, unfeeling, unsympathetic, hardened) |
| uncompassionate(adjective, hard, unfeeling, unsympathetic, hardened) |
| unemotional(adjective, hard, unfeeling, unsympathetic, prepared) |
| unfaltering(adjective, serious, resolute, persistent, unwavering) |
| unfeeling(adjective, hard, unsympathetic, hardened, unbending) |
| unflinching(adjective, serious, resolute, persistent, unwavering) |
| unhesitating(adjective, serious, resolute, persistent, unwavering) |
| unrepenting(adjective, hard, unfeeling, unsympathetic, prepared) |
| unsubmissive(adjective, hard, unfeeling, unsympathetic, prepared) |
| unwavering(adjective, serious, resolute, persistent, gritty) |
| apathetic(adjective, hard, unfeeling, unsympathetic, hardened) |
| blind to(expression, adjective, hard, unfeeling, unsympathetic) |
| careless(adjective, hard, unfeeling, unsympathetic, hardened) |
| casehardened(adjective, hard, unfeeling, unsympathetic, hardened) |
| cold(adjective, hard, unfeeling, unsympathetic, hardened) |
| cold-blooded(adjective, hard, unfeeling, unsympathetic, hardened) |
| coldblooded(adjective, callous, disciplined, unexcitable, grooved) |
| cynical(adjective, hard, unfeeling, unsympathetic, hardened) |
| deaf to(expression, adjective, hard, unfeeling, unsympathetic) |
| determined |