力透纸背 lìtòuzhǐbèi forceful calligraphy Origin Definitions Defs Strokes Stroke Words Sentences Sents 力 lì noun strength physical strength; power; might透 tòu particleverb to penetrate to pass through or seep into something纸背 紙背 zhǐbèi reverse side the back or reverse side of a sheet of paper