| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | empty; unintelligent |
| Synonyms: | airheaded, birdbrained, blank, drained, dull, dumb, emptied, foolish, half-baked, inane, lamebrained, minus, shallow, silly*, stupid, superficial, uncomprehending, unreasoning, vacant, void |
| Notes: | vacant pertains mainly to things (vacant house) while vacuous pertains mainly to the absence or near absence of meaning or intelligence (vacuous expression) |
| Antonyms: | aware, filled, full, intelligent |
| Main Entry: | witless |
| Part of Speech: | adjective |
| Definition: | foolish |
| Synonyms: | absurd, asinine, birdbrained, brainless, cockamamy, crazy, daffy, doltish, dotty, dumb, feebleminded, half-baked, half-witted, harebrained, idiotic, ill-advised, irrational, jerky, kooky, loony, ludicrous, lunatic, mad, mindless, moronic, nonsensical, nutty, ridiculous, senseless, silly, stupid, unintelligent, unwise, wacky*, zany* |
| Main Entry: | zany |
| Part of Speech: | adjective |
| Definition: | crazy, funny |
| Synonyms: | camp*, campy, clownish, comical, dumb, eccentric, fool, foolish, goofy, hare-brained, humorous, joshing, kooky, loony, madcap, nutty, sappy*, wacky*, witty |
| Antonyms: | serious |
| Main Entry: | insensate |
| Part of Speech: | adjective |
| Definition: | stupid |
| Synonyms: | dumb*, foolish, irrational, senseless, witless |
| Notes: | insensate means without sensitivity or humane feeling; insentient means incapable of either |
| Main Entry: | dim-witted |
| Part of Speech: | adjective |
| Definition: | stupid |
| Synonyms: | dull, dumb, feebleminded, idiotic, slow |
| Antonyms: | smart |
| Main Entry: | voiceless |
| Part of Speech: | adjective |
| Definition: | silent |
| Synonyms: | dumb, inarticulate, mute, speechless, wordless |
| Main Entry: | thickheaded |
| Part of Speech: | adjective |
| Definition: | ignorant |
| Synonyms: | blockheaded, boneheaded, dense, dull, dumb, idiotic, stupid |
| Main Entry: | brainless |
| Part of Speech: | adjective |
| Definition: | idiotic |
| Synonyms: | anencephalic, anencephalous, dumb, foolish, imbecile, mindless, senseless, silly, stupid, thoughtless, witless |
| Antonyms: | smart |
| Main Entry: | aphonic |
| Part of Speech: | adjective |
| Definition: | voiceless |
| Synonyms: | dumb, inarticulate, mute, silent, speechless, unarticulate |