| 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) |
| hard-edged(adjective, toughened, cynical, hard-boiled, hard-bitten) |
| hard-nosed(adjective, hard, unfeeling, unsympathetic, hardened) |
| hardboiled(adjective, callous, disciplined, seasoned, unexcitable) |
| impassive(adjective, hard, unfeeling, unsympathetic, hardened) |
| indifferent(adjective, hard, unfeeling, unsympathetic, hardened) |
| inexcitable(adjective, callous, unexcitable, hard-as-nails) |
| inflexible(adjective, hard, unfeeling, unsympathetic, hardened) |
| insensate(adjective, hard, unfeeling, unsympathetic, hardened) |
| insensible(adjective, hard, unfeeling, unsympathetic, hardened) |
| insentient(adjective, hard, unfeeling, unsympathetic, hardened) |
| long-established |
| matter of fact(expression, adjective, idiom, callous, unexcitable) |
| poker-faced(adjective, callous, unexcitable, hard-as-nails) |
| recidivist |
| recidivistic |