| rigid(adjective, strong, hard, solid, stiff) |
| accustomed(adjective, hard, unfeeling, unsympathetic, hardened) |
| apathetic(adjective, hard, tough, careless, indifferent) |
| avaricious(adjective, hard, tough, harsh, cruel) |
| benumbed(adjective, hard, unfeeling, unsympathetic, hardened) |
| blind to(expression, adjective, hard, careless, indifferent) |
| bloody(adjective, hard, tough, harsh, cruel) |
| calloused |
| careless(adjective, hard, indifferent, cruel, apathetic) |
| case-hardened(adjective, hard, careless, indifferent, cruel) |
| cold(adjective, hard, tough, careless, indifferent) |
| cold-blooded(adjective, hard, tough, careless, indifferent) |
| coldhearted(adjective, hard, unfeeling, unsympathetic, hardened) |
| compact(adjective, hard) |
| concentrated(adjective, hard) |
| consolidated(adjective, hard) |
| contemptuous(adjective, hard, unfeeling, unsympathetic, hardened) |
| cruel(adjective, hard, rough, harsh, careless) |
| cynical(adjective, hard, tough, unfeeling, unsympathetic) |
| deaf to(expression, adjective, hard, careless, indifferent) |