| heedless(adjective, indifferent, cheerful, casual, unsympathetic) |
| inanimate(adjective, dull, low, depressed, lethargic) |
| lacking interest |
| laid-back(adjective, calm, dull, cool, weak) |
| moony(adjective, dull, weak, easy, slow) |
| negligent(adjective, calm, quiet, cool, easy) |
| perfunctory(adjective, informal, relaxed, indifferent, detached) |
| sleepy(adjective, dull, quiet, easy, slow) |
| tardy(dull, slow, careless, sluggish, lazy) |
| aloof(adjective, calm, cool, temper, relaxed) |
| benumbed(adjective, lethargic) |
| drugged(adjective, tired, lethargic, sleepy, dazed) |
| frigid(adjective, temper, cold, negative, indifference) |
| halfhearted(adjective, temper, careless, cold, indifferent) |
| incurious(adjective, calm, cool, careless, relaxed) |
| insensitive(adjective, temper, cold, indifferent, negative) |
| lagging(adjective, dull, idle, sluggish, dubious) |
| leisurely(adjective, dull, quiet, weak, easy) |
| lumpish(adjective, lethargic) |
| lymphatic(adjective, action, weak, heavy, still) |