expression, i-adjective
there is no cure for stupidity; a born fool is never cured
Proverb meaning that foolishness or stupidity cannot be fixed, just as there is no medicine for it. Often used resignedly or humorously.
何度注意しても同じ失敗をするなんて、馬鹿につける薬はないね。
He makes the same mistake no matter how many times I warn him—there's no cure for stupidity.
He got fooled again? There's no medicine for fools.