攻其不备 gōngqíbùbèi to catch someone off guard Origin Definitions Defs Strokes Stroke Words Sentences Sents 出其不意，攻其不备 chūqíbùyìgōngqíbùbèi to catch an enemy off guard To catch an enemy off guard with a surprise attack; an idiom from Sunzi's "The Art of War" [[孙子兵法|孫子兵法|sun1 zi3 bing1 fa3]]