| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | stupid, foolish |
| Synonyms: | asinine, backward, deranged, dim-witted, dull, fatuous, feeble-minded, idiotic, imbecilic, inane, ludicrous, moronic, simple, simple-minded, slow, thick, witless |
| Antonyms: | brainy, intelligent, smart |
| Main Entry: | fatuous |
| Part of Speech: | adjective |
| Definition: | stupid |
| Synonyms: | absurd, asinine, birdbrained, boneheaded, brainless, dense, dull, foolish, idiotic, imbecile, inane, insensate, jerky, lamebrained, ludicrous, lunatic, mad, mindless, moronic, puerile, sappy, silly, simple, vacuous, witless |
| Antonyms: | aware, bright, intelligent, keen, sensible, smart |
| Main Entry: | idiotic |
| Part of Speech: | adjective |
| Definition: | very stupid |
| Synonyms: | asinine, batty, birdbrained, crazy, daffy, daft, dull, dumb, fatuous, foolhardy, foolish, harebrained, imbecile, imbecilic, inane, insane, lunatic, moronic, senseless, silly, squirrelly, thick-witted, unintelligent |
| Antonyms: | brainy, intelligent, smart |
| Main Entry: | senile |
| Part of Speech: | adjective |
| Definition: | failing in physical and mental capabilities due to old age |
| Synonyms: | aged, ancient, anile, decrepit, doddering, doting, enfeebled, feeble, imbecile, in second childhood, infirm, old, senescent, shattered, sick, weak |
| Antonyms: | alert, well, young |
| Main Entry: | simple |
| Part of Speech: | adjective |
| Definition: | feeble-minded; not intelligent |
| Synonyms: | amateur, asinine, backward, brainless, credulous, dense, dimwitted, dull, dumb, fat, feeble, foolish, green*, gullible, half-witted, idiotic, ignorant, illiterate, imbecile, inane, inexperienced, inexpert, insensate, mindless, moronic, nitwitted, obtuse, senseless, shallow, silly, simple-minded, slow, soft, soft-headed, stupid, thick, uneducated, unintelligent, witless |
| Notes: | simple means 'plain, uncomplicated'; simplistic means 'characterized by a forced, unwarranted simplicity' |
| Antonyms: | aware, intelligent, on-the-ball, smart |
| Main Entry: | slow |
| Part of Speech: | adjective |
| Definition: | unintelligent |
| Synonyms: | backward, dense, dim, dimwitted, dull, dumb, dunce, imbecile, limited, moronic, obtuse, simple, slow on the uptake, stupid, thick, unresponsive |
| Antonyms: | cognizant, intelligent, smart |
| Main Entry: | retarded |
| Part of Speech: | adjective |
| Definition: | limited |
| Synonyms: | backward, birdbrained, defective, dim, dim-witted, dopey, dull, dumbbell, dumbo, dumdum, dummy, exceptional, feeble-minded, gorked, half-witted, held back, imbecile, lamebrained, mentally defective, moronic, numbskull, opaque, pinhead, retardo, sappy, simple, simple-minded, slow, slow-witted, stupid, subnormal, touched, underachieving, weak, yo-yo |
| Main Entry: | half-witted |
| Part of Speech: | adjective |
| Definition: | stupid |
| Synonyms: | asinine, defective, dull, dull-witted, feebleminded, foolish, imbecile, senseless, silly, witless |
| Main Entry: | brainless |
| Part of Speech: | adjective |
| Definition: | idiotic |
| Synonyms: | anencephalic, anencephalous, dumb, foolish, imbecile, mindless, senseless, silly, stupid, thoughtless, witless |
| Antonyms: | smart |