| cold-blooded(adjective, cool, tough, rational, straightforward) |
| coldhearted(adjective, detached, impassive, unresponsive, laid-back) |
| compliant(adjective, quiet, indifferent, apathetic, lifeless) |
| cool-headed |
| creeping(adjective, slow) |
| cycloid |
| cyclothyme |
| cyclothymic |
| deaden |
| deaf(adjective, indifferent, unsympathetic, inattentive, uninterested) |
| delaying(adjective, slow) |
| deliberate(adjective, calm, quiet, moderate, easy) |
| diffident(adjective, indifferent, detached, distant, apathetic) |
| docile(adjective, quiet, indifferent, apathetic, lifeless) |
| doltish(adjective, dull, slow, stupid, impassive) |
| down(adjective, dull, slow, heavy, still) |
| down-to-earth(adjective, tough, rational, straightforward, sober) |
| draggy(adjective, dull, simple, slow, heavy) |
| dreamy(still, lethargic, languid, sleepy, indolent) |
| drippy(adjective, dull, slow, heavy, sluggish) |