怎不 zěnbù how can one not Origin Definitions Defs Strokes Stroke Words Sentences Sents 怎 zěn adverb how (bound form) how; why. Used to ask a question about a manner or cause, similar to 怎么 zěnme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