动脑 dòngnǎo to use one's brain Origin Definitions Defs Strokes Stroke Words Sentences Sents 动脑筋 dòngnǎojīn to think hard to use one's brains; to think carefully or actively; to rack one's brains动脑子 dòngnǎozi to use one's head to use one's head; to use one's brains; to think hard about something