| imbecilic(adjective, dull, weak, simple, knowledge) |
| stupid(adjective, dull, weak, simple, mind) |
| idiotic(adjective, dull, weak, simple, knowledge) |
| foolish(adjective, dull, weak, simple, knowledge) |
| fatuous(adjective, weak, simple, silly, foolish) |
| crazy(adjective, weak, simple, knowledge, ability) |
| nonsensical(adjective, dull, weak, simple, knowledge) |
| silly(adjective, weak, simple, knowledge, ability) |
| asinine(adjective, weak, simple, silly, foolish) |
| senseless(adjective, dull, weak, simple, slow) |
| absurd(adjective, weak, simple, knowledge, ability) |
| dumb(adjective, dull, simple, slow, silly) |
| dull(adjective, simple, slow, silly, foolish) |
| brainless(adjective, dull, weak, simple, slow) |
| dim-witted(adjective, dull, simple, slow, foolish) |
| inane(adjective, dull, simple, slow, silly) |
| mad(adjective, weak, simple, knowledge, ability) |
| imbecile(adjective, dull, simple, slow, silly) |
| ludicrous(adjective, dull, weak, simple, silly) |
| mindless(adjective, dull, simple, slow, silly) |