不韪 bùwěi fault 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韪 韙 wěi right (bound form) right; correct. Often used in the literary phrase 不韪 bùwěi to describe something that is not right or an offense.