一心二用 yīxīn'èryòng to multitask Origin Definitions Defs Strokes Stroke Words Sentences Sents 一心 yīxīn verb wholeheartedly wholeheartedly; single-mindedly; with one's whole heart and soul二 èr numeral two the number two; 2用 yòng verb to use To use; to employ; to apply or make use of something to achieve a purpose.