Read Edit View history 挖空心思 wākōngxīnsi rack brains Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 挖空心思 · wākōngxīnsi · rack brains 2026/03/04 挖空心思 wākōngxīnsi rack brains to rack one's brains; to exhaust every possible thought or scheme 为了解决这个问题，他挖空心思地想了半天。 idiom created sense Mar 4, 2026, 02:25 AM