brainless

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++brain·less /ˈbreɪnləs/ adjective  STUPID/NOT SENSIBLEcompletely stupid 没有头脑的，傻的，愚笨的 What a brainless thing to do! 这样做真是没有脑子！ —brainlessly adverb

Examples from the Corpus

brainless• He had the body of an athlete, every sinew honed down to perfection, but he wasn't brainless.• Married doesn't mean redundant and most definitely doesn't mean brainless.• He was the ideal caricature used by brainless, anti-semitic writers of fiction who were conceived in sewers.• You brainless idiot!• My sister's latest boyfriend is pretty brainless; it's impossible to have a conversation with him.• 'You brainless scum!' he shouted after the departing boys.

brain·less adjectiveChineseSyllable  

completely Corpus stupid

brainless
brain‧less /ˈbreɪnləs/ adjective
completely stupid:
    What a brainless thing to do!
—brainlessly adverb

brain·lessBrE /ˈbreɪnləs/ 🔊NAmE /ˈbreɪnləs/ 🔊 adjectivestupid; not able to think or talk in an intelligent way 愚蠢的；无头脑的