铁杵 tiěchǔ iron pestle Origin Definitions Defs Strokes Stroke Words Sentences Sents 1 sentence 只要工夫深，铁杵磨成针。 zhǐyào gōngfu shēn, tiěchǔ mó chéng zhēn. With enough hard work, even an iron rod can be ground into a needle. Source: Dong Chinese Dictionary