磨杵成针 Save Sign in to save words Traditional (Taiwan): 磨杵成針 móchǔchéngzhēn ㄇㄛˊ ㄔㄨˇ ㄔㄥˊ ㄓㄣ to grind an iron bar down to a fine needle (idiom) fig. to persevere in a difficult task to study diligently Character by character 磨(mó)rub 杵(chǔ)pestle 成(chéng)surname Cheng 针(zhēn)needle A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0