劳心苦思 láoxīnkǔsī to rack one's brains Definitions Defs Origin Strokes Stroke Words Sentences Sents 劳心 勞心 láoxīn to tax one's mind To put in great mental effort or go to a lot of trouble to get something done; to rack one's brains.苦思 kǔsī to think hard to think long and hard about something; to rack one's brains; to ponder deeply
