柯林斯詞典whetstone /?w?t?st??n/ (whetstones) 1. N-COUNT A whetstone is a stone used for sharpening knives or other tools that have a blade. 磨刀石[usu sing] 返回 whetstone劍橋詞典a stone used for sharpening the blades of knives or other cutting tools 磨刀石 返回 whetstone