| meek(adjective, calm, quiet, humble, shy) |
| nonsensical(adjective, dull, foolish, stupid, half-baked) |
| thick-witted(adjective, ability, foolish, stupid, crazy) |
| unintelligent(adjective, dull, simple, slow, silly) |
| blockheaded(adjective, dull, simple, ability, slow) |
| dimwitted(adjective, dull, simple, slang, ability) |
| loony(adjective, foolish, impractical, unintelligent, half-baked) |
| witless(adjective, dull, simple, slow, silly) |
| ignorant(adjective, dull, simple, slow, silly) |
| incoherent(adjective, quiet, soft, still, confused) |
| nutty |
| unresponsive(adjective, calm, quiet, humble, shy) |
| vacuous(adjective, simple, slow, stupid, empty) |
| absurd(adjective, foolish, impractical, unintelligent, half-baked) |
| empty-headed(adjective, simple, silly, foolish, stupid) |
| aphonic(adjective, silent, dazed, astonished, thunderstruck) |
| backward(adjective, dull, simple, slow, silly) |
| brain-dead(adjective, stupid, absence or want of intellect) |
| daft(adjective, simple, slow, silly, foolish) |
| fool(noun, adjective, absence or want of intellect) |