I. transitive verb
also pean ˈpēn
( -ed/-ing/-s )
Etymology: probably of Scandinavian origin; akin to Norwegian penne to hammer out thin, from penn, n., peen
1. : to draw, bend or flatten (as metal or leather) by hammering with a peen
2. : to work the surface of (metal) by a stream of shot
great improvement has been brought about in the service life of springs by shot peening — D.K.Bullens
II. noun
or pein also pean ˈpēn
( -s )
Etymology: probably of Scandinavian origin; akin to Norwegian penn peen, Swedish pen
: the hemispherical, wedge-shaped, or otherwise formed end of the head of a hammer opposite the face, used for bending, indenting, or cutting the material being struck — compare ball peen , cross peen