[peen] vt (1513): to draw, bend, or flatten by or as if by hammering with a peen
[2]peen n [prob. of Scand origin; akin to Norw penn peen] (1683): a usu. hemispherical or wedge-shaped end of the head of a hammer that is opposite the face and is used esp. for bending, shaping, or cutting the material struck