peen

n. 锤顶
vt. 用锤顶敲击, 敲弯头
【机】 尖底捣锤

动词过去式:peened 过去分词:peened 现在分词:peening 第三人称单数:peens 

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]