是药三分毒 shìyàosānfēndú every medicine has its side effect Origin Definitions Defs Strokes Stroke Words Sentences Sents 是 shì every used before a noun to mean every, any, or all药 藥 yào noun medicine medicine; drug; substance used to treat disease or kill pests三分 sānfēn noun thirty percent three-tenths of the whole毒 dú noun poison poison; toxin; harmful substance