不用心 bùyòngxīn inattentive 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用心 yòngxīn verb + noun diligent to be attentive; to be diligent or careful; to apply oneself to something