| unperturbed(adjective, calm, cool, relaxed, detached) |
| unrelenting(adjective, mean, hard, tough, harsh) |
| unresponsive |
| unruffled(adjective, calm, cool, relaxed, casual) |
| unshakable(adjective, mean, hard, tough, harsh) |
| unsympathetic(adjective, mean, hard, tough, harsh) |
| unyielding(adjective, mean, hard, harsh, inflexible) |
| wooden(adjective, cool, blank, aloof, unemotional) |
| anesthetized(adjective, unfeeling, hard-hearted, nowhere, obdurate) |
| blank(adjective, unemotional, emotionless, expressionless, inexpressive) |
| blind to(expression, adjective, callous, unexcitable, hard-as-nails) |
| calm(adjective, cool, relaxed, detached, casual) |
| case-hardened(adjective, callous, unexcitable, hard-as-nails) |
| casehardened(adjective, callous, unexcitable, hard-as-nails) |
| casual(adjective, calm, cool, relaxed, detached) |
| coldblooded(adjective, unfeeling, placid, callous, hard-hearted) |
| coldhearted(adjective, unfeeling, callous, hard-hearted, nowhere) |
| cool cat(expression, adjective, unfeeling, hard-hearted, nowhere) |
| deadpan(adjective, blank, unemotional, emotionless, expressionless) |
| deaf |