伤脑筋 shāngnǎojīn HSK7 rack one's brains Definitions Defs Origin Strokes Stroke Words Sentences Sents Showing: troublesome All meanings 2 shāngnǎojīn 2 rack one's brains 1troublesome 1 1 sentence for 伤脑筋 (shāngnǎojīn — troublesome) 这个顽皮的孩子真让人伤脑筋。 zhège wánpí de háizi zhēn ràng rén shāngnǎojīn. This naughty child is a real handful. Source: Dong Chinese Dictionary