| blockish(adjective, simple) |
| careless(adjective, dull, sharp, rough, wild) |
| confused(adjective, careless, foolish, senseless, impassive) |
| dead(adjective, dull, flat, cold, ordinary) |
| demented(silly, foolish, crazy, mad, unreasonable) |
| donkey |
| dumbbell(noun, adjective, dull, simple, fool) |
| goosey |
| harebrained(adjective, weak, simple, wild, silly) |
| hebetudinous(adjective, action, dull, simple, ability) |
| idle(adjective, weak, apathetic, sluggish, incompetent) |
| ill-considered(adjective, weak, simple, careless, silly) |
| ill-judged(inappropriate, unwise, imbecility folly) |
| impolitic(adjective, sharp, rough, harsh, rude) |
| improper(adjective, dull, flat, slow, offensive) |
| inactive(adjective, dull, heavy, apathetic, sluggish) |
| inapt(adjective, suitable, incompetent, imbecility folly, unskillfulness) |
| inattentive(adjective, dull, careless, foolish, vague) |
| incompetent(adjective, weak, idle, worthless, inept) |
| incongruous(adjective, dull, flat, slow, silly) |