a heavy stick made of clay , stone or metal , with a thick rounded end, which is used for crushing substances in a mortar (= a small strong bowl ) by hitting or rubbing them
发音
例句
1. He ground the rock candy with a mortar and pestle. 他自己动手用研钵和杵把冰糖研成粉。 2. An iron pestle can be ground down to a needle. 只要功夫深,铁杵磨成针。