如履薄冰 rúlǚbóbīng extremely cautious Origin Definitions Defs Strokes Stroke Words Sentences Sents 如临深渊，如履薄冰 rúlínshēnyuānrúlǚbóbīng to tread on thin ice (idiom) to be extremely cautious and on guard, as if standing at the edge of a deep abyss or walking on thin ice; to proceed with extreme caution and apprehension