温故知新 wēngùzhīxīn to learn new things by reviewing the old Origin Definitions Defs Strokes Stroke Words Sentences Sents 温 溫 wēn to review to review or go over previously learned material, such as a lesson故 gù noun former (bound form) original; former; old; previous知 zhī verb to know to know; to be aware of; to realize or sense新 xīn [new things] new things; new people; new knowledge