| stupid(noun, adjective, dull, simple, ability) |
| foolish(adjective, dull, simple, slow, silly) |
| dull(verb, adjective, calm, quiet, simple) |
| silent(adjective, calm, close, quiet, soft) |
| speechless(adjective, calm, close, quiet, beat) |
| idiotic(adjective, dull, simple, slow, silly) |
| mute(adjective, calm, dull, close, quiet) |
| moronic(adjective, dull, simple, slow, silly) |
| doltish(adjective, dull, simple, ability, slow) |
| thick(adjective, dull, simple, ability, slow) |
| dense(adjective, dull, simple, ability, slow) |
| voiceless(adjective, quiet, still, speak, silent) |
| dim-witted(adjective, dull, simple, slow, foolish) |
| dim(adjective, dull, simple, slow, foolish) |
| half-assed |
| inarticulate(adjective, calm, quiet, humble, speak) |
| unrequited(adjective, calm, quiet, humble, shy) |
| obtuse(adjective, dull, simple, ability, slow) |
| brainless(adjective, dull, simple, slow, silly) |
| tongue-tied(adjective, calm, quiet, humble, speak) |