| idle(adjective, dull, careless, cold, indifferent) |
| insensible(adjective, dull, quiet, hard, cool) |
| insensitive(adjective, dull, quiet, hard, careless) |
| joyless(adjective, cool, unfriendly, aloof, distant) |
| lacking interest |
| lazy(adjective, dull, weak, easy, slow) |
| lukewarm(adjective, dull, cool, flat, warm) |
| matter-of-fact(adjective, cool, excite, cold, useful) |
| mild(adjective, dull, quiet, weak, kind) |
| miserable(adjective, blue, sad, unhappy, pitiful) |
| morose(adjective, blue, low, sad, unhappy) |
| nonchalant(adjective, cool, blank, aloof, unemotional) |
| nonliving(lifeless, inorganic) |
| recreant(adjective, unfaithful, cowardly) |
| sickly(adjective, dull, weak, heavy, still) |
| sleepy(adjective, dull, slow, relaxed, still) |
| stale(adjective, dull, weak, flat, cold) |
| stupefied(adjective, dull, weary, apathetic, tired) |
| timorous(nervous, shy, fearful, cowardice) |
| unfriendly(adjective, unemotional, emotionless, taciturn) |