铁杵成针 tiěchǔchéngzhēn to grind an iron bar into a needle Origin Definitions Defs Strokes Stroke Words Sentences Sents 铁 鐵 tiě noun iron iron (Fe); the metal used for making steel and tools杵 chǔ pestle a wooden stick used to pound rice, medicine, or laundry成 chéng verbparticle to become to become; to turn into; to change into针 針 zhēn noun needle needle; pin; a small, thin tool used for sewing or knitting