悉心竭力 xīxīnjiélì to do one's utmost Definitions Defs Origin Strokes Stroke Words Sentences Sents 悉心 xīxīn with utmost care to put one's heart and soul into something; with great care; devotedly竭力 jiélì to do one's utmost To use all of one's strength or power to do something; to do everything within one's power