| reserved(adjective, cool, blank, aloof, impassive) |
| unemotional person(noun, expression, idiom, person, being) |
| cold(adjective, calm, cool, tough, indifferent) |
| deadpan(adjective, calm, tough, rational, straightforward) |
| insensitive(adjective, dull, cold, indifferent, impassive) |
| nonchalant(adjective, cool, blank, aloof, unemotional) |
| passive(adjective, calm, dull, indifferent, unconcerned) |
| uninterested(adjective, indifferent, unconcerned, uncaring, listless) |
| unresponsive(adjective, calm, dull, cold, indifferent) |
| hard-hearted(adjective, impassive, laid-back, dispassionate, emotionless) |
| lethargic(adjective, calm, indifferent, unconcerned, unemotional) |
| quiet(adjective, impassive, laid-back, dispassionate, emotionless) |
| unexcitable(adjective, calm, dull, cool, blank) |
| along for the ride(expression, adjective, idiom, calm, impassive) |
| callous(adjective, cool, cold, indifferent, blank) |
| composed(adjective, calm, cool, blank, aloof) |
| hard-boiled(adjective, tough, rational, straightforward, sober) |
| insensible(adjective, cool, indifferent, blank, aloof) |
| laid-back(adjective, indifferent, unconcerned, impassive, uncaring) |
| reticent(adjective, cool, blank, aloof, impassive) |