| cheerful(adjective, feature, state, trait) |
| daring(adjective, reckless) |
| deadpan(adjective, blank, unemotional, emotionless, expressionless) |
| feckless(adjective, feature, state, indifferent, trait) |
| glib(adjective, indifferent, casual) |
| hardened(adjective, cool, indifferent, blank, aloof) |
| hardhearted(adjective, unfeeling, insensitive, insensible) |
| impartial(adjective, indifferent, detached, aloof, distant) |
| level-headed(adjective, calm, cool, steady, casual) |
| light-hearted(adjective, feature, state, trait) |
| lighthearted(adjective, feature, state, trait, cheerful) |
| mellow(adjective, calm, cool, relaxed, indifferent) |
| moderate(adjective, mild, relaxed, tolerant, laid-back) |
| poker-faced(adjective, cool, indifferent, detached, blank) |
| self-controlled(adjective, calm, quiet, relaxed, casual) |
| steady(adjective, calm, cool, unflappable, unexcitable) |
| supine(adjective, cold, indifferent, dead, unsympathetic) |
| uncompassionate(adjective, insensitive) |
| Laodicean(adjective, cold, dead, apathy, passive) |
| anesthetized(adjective, insensitive) |