不灰木 bùhuīmù asbestos 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灰 huī to burn to burn to ashes; to incinerate木 mù noun wood (bound form) wood; timber; lumber