| icy(adjective, mean, hard, cool, tough) |
| realistic(rational, straightforward, down-to-earth) |
| undemonstrative(adjective, calm, dull, cool, flat) |
| unexcitable(adjective, calm, dull, quiet, cool) |
| unruffled(adjective, calm, quiet, cool, moderate) |
| chill(adjective, cool, informal, indifferent, restrained) |
| chilly(restrained, detached, phlegmatic, unromantic, loveless) |
| controlled(adjective, calm, self-possessed, unflappable, contained) |
| dead(adjective, cold, unfriendly, apathy, passive) |
| hardhearted(adjective, hard, cold, cruel, unfriendly) |
| quiet(adjective, calm, cool, still, detached) |
| restrained(adjective, calm, controlled, self-possessed, phlegmatic) |
| reticent(adjective, calm, cool, restrained, detached) |
| stoical(adjective, calm, cool, cold, indifferent) |
| tough(adjective, calm, mean, hard, cool) |
| anesthetized(adjective, hard, tough, severe, cold) |
| bland(adjective, quiet, cool, friendly, still) |
| collected(adjective, calm, quiet, cool, moderate) |
| disinterested(adjective, calm, dull, quiet, mean) |
| hard-hearted(adjective, mean, hard, tough, severe) |