| thick-skinned(adjective, calm, cool, steady, detached) |
| tough(adjective, calm, detached, sober, unfeeling) |
| unaffected(adjective, calm, cool, steady, collected) |
| unbiased(adjective, calm, detached, sober, unfeeling) |
| uncompassionate(adjective, calm, dull, flat, detached) |
| unconstrained |
| undemonstrative(adjective, calm, dull, flat, detached) |
| unfeeling(adjective, calm, dull, cool, flat) |
| unflustered(adjective, calm, cool, steady, detached) |
| unimpressed(adjective, quiet, cool, moderate, gentle) |
| unimpressible(adjective, cool, blank, aloof, unemotional) |
| unimpressionable(adjective, detached, impassive, unresponsive, insensitive) |
| uninterested |
| uninvolved(adjective, calm, dull, flat, detached) |
| unprejudiced(adjective, calm, detached, sober, unfeeling) |
| unresponsive(adjective, calm, dull, flat, detached) |
| unsympathetic(adjective, detached, impassive, unresponsive, insensitive) |
| untouched(adjective, calm, cool, steady, unaffected) |
| well balanced |
| whispering(adjective, calm, quiet, easy, mild) |