| unintelligent(adjective, simple, slow, stupid, boring) |
| brainless(adjective, simple, slow, stupid, boring) |
| vacuous(adjective, simple, slow, stupid, boring) |
| witless(adjective, simple, slow, stupid, boring) |
| moronic(adjective, simple, slow, stupid, boring) |
| insensate(adjective, simple, slow, stupid, boring) |
| addled(adjective, simple, slow, stupid, boring) |
| backward(adjective, simple, slow, stupid, boring) |
| besotted(adjective, simple, slow, stupid, boring) |
| daffy(adjective, simple, slow, stupid, boring) |
| daft(adjective, simple, slow, stupid, boring) |
| dense(adjective, simple, slow, stupid, boring) |
| dim-witted(adjective, simple, slow, stupid, boring) |
| feeble-minded(adjective, simple, slow, stupid, boring) |
| half-baked(adjective, simple, slow, stupid, boring) |
| indolent(adjective, simple, slow, stupid, boring) |
| not bright(expression, adjective, simple, slow, stupid) |
| numskulled(adjective, simple, slow, stupid, boring) |
| scatterbrained(adjective, simple, slow, stupid, boring) |
| shallow(adjective, simple, slow, stupid, boring) |