不能不 bùnéngbù HSK5 have to Definitions Defs Origin Strokes Stroke Words Sentences Sents 不能 bùnéng auxiliary cannot To be unable to; to be incapable of doing something due to external circumstances or lack of ability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