| dense(adjective, dull) |
| depressed(adjective, dull, quiet, flat, low) |
| dilatory(adjective, dull, quiet, easy, careless) |
| disenchanted(adjective, cool, indifferent, sophisticated, nonchalant) |
| doltish(adjective, dull) |
| faint(adjective, dull, weak, heavy, still) |
| feeble(adjective, dull, weak, easy, slow) |
| hesitant(adjective, unfaithful, disloyal) |
| inconsiderate(adjective, sharp, rude, indifferent, short) |
| inhuman(adjective, hard, tough, severe, temper) |
| insentient(adjective, hard, careless, cold, indifferent) |
| leisurely(adjective, dull, quiet, weak, easy) |
| lost(adjective, careless, cold, dead, apathy) |
| meek(adjective, unexcitable, unenterprising, unaspiring, unthrusting) |
| merciless(adjective, person, hard, tough, severe) |
| mild(adjective, dull, warm, lukewarm, unexcitable) |
| moony(adjective, dull, quiet, weak, easy) |
| non-caring(adjective, cold, dead, aloof, apathy) |
| numbed(adjective, unfeeling, numb, insensitive, unconscious) |
| obdurate(adjective, person, mean, hard, cool) |