不明不白 bùmíngbùbái vague Origin Definitions Defs Strokes Stroke Words Sentences Sents 不明 bùmíng adjective unknown not clear; unknown; uncertain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白 bái verb clear clear; obvious; easy to understand