不顶事 bùdǐngshì useless Origin Definitions Defs Strokes Stroke Words Sentences Sents 不 bù adverb not Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings顶事 頂事 dǐngshì to be useful to be useful; to serve a purpose; to be effective or fitting