Read Edit View history 劳心苦思 láoxīnkǔsī to rack one's brains Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 劳心苦思/ 勞心苦思 láoxīnkǔsī to rack one's brains to rack one's brains; to think hard Edit Delete References Add reference No references for this word.