效用 xiàoyòng usefulness Origin Definitions Defs Strokes Stroke Words Sentences Sents xiàoyòng usefulness · utility 效 xiào nounverb effect (bound form) effect; result; efficacy; function用 yòng noun usefulness Usefulness; utility; the effect or function of something.xiàoyòng to serve 效 xiào verbnoun to devote (bound form) to devote oneself to; to render service; to offer up用 yòng verb to use To use; to employ; to apply or make use of something to achieve a purpose.