peen
n.（名词）The end of a hammerhead opposite the flat striking surface, often wedge-shaped or ball-shaped and used for chipping, indenting, and metalworking.锤顶：锤头平的打击面反面通常呈楔形或半球形的顶端，用于削、凿和金属加工v.tr.（及物动词）peened,peen.ing,peens To hammer, bend, or shape with a peen.锤打：锤击、使弯曲或用锤顶来打成一定形状
来源：[Probably of Scandinavian origin] [可能源于斯堪的纳维亚半岛]
