穷思苦想 qióngsīkǔxiǎng to rack one's brains Origin Definitions Defs Strokes Stroke Words Sentences Sents 穷 窮 qióng thoroughly thoroughly; exhaustively; to investigate something to its very roots思 sī verbadjective to think (bound form) to think; to consider; to deliberate苦想 kǔxiǎng to think hard to rack one's brains; to think long and hard about something