不宣 bùxuān not to declare Definitions Defs Origin 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宣 xuān verbnoun to declare (bound form) to declare publicly; to announce; to spread or broadcast