知彼知己 zhībǐzhījǐ know both sides Origin Definitions Defs Strokes Stroke Words Sentences Sents 知彼知己，百战不殆 zhībǐzhījǐ, bǎizhànbùdài strategic awareness knowing the enemy and yourself will get you unscathed through a hundred battles (idiom, from Sunzi's "The Art of War")