| composed(adjective, calm, cool, restrained, steady) |
| cool cat(expression, adjective, cool, detached, blank) |
| crotchety(adjective, hard, tough, severe, cruel) |
| cushdy |
| daredevil |
| deadpan(adjective, cool, detached, blank, sober) |
| deaf to(expression, adjective, hard, careless, indifferent) |
| dense |
| detached(adjective, cool, indifferent, blank, weary) |
| dim-witted |
| disimpassioned(adjective, calm, cool, steady, tranquil) |
| distant(adjective, cool, indifferent, detached, blank) |
| dogged(adjective, mean, hard, harsh, inflexible) |
| doltish |
| dull-witted |
| easy-going(adjective, calm, restrained, unconcerned, subdued) |
| equanimous(adjective, calm, cool, steady, tranquil) |
| exacting(adjective, hard, tough, severe, harsh) |
| feelingless(adjective, hard, tough, severe, indifferent) |
| firm(adjective, mean, hard, tough, harsh) |