asinine

adjective

Extremely stupid or foolish.

SYNONYMS

absurdbrainlesschildishdoltishempty-headedfatuousfoolishhalf-bakedhalf-wittedidioticimbecileimbecilicimmatureinaneinfantileinsanejuvenileludicrouslunaticmindlessnonsensicalpointlesspreposterouspuerileridiculoussenselesssillyslow-wittedstupidunintelligentweak-mindedwitless