DICT.TW Dictionary Taiwan

 peen /ˈpin/
 錘頭(vt.)敲擊,敲彎頭

 Peen n.  (a) A round-edged, or hemispherical, end to the head of a hammer or sledge, used to stretch or bend metal by indentation. (b) The sharp-edged end of the head of a mason's hammer. [Spelt also pane, pein, and piend.]

 Peen, v. t. To draw, bend, or straighten, as metal, by blows with the peen of a hammer or sledge.
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 peen
      n : the part of a hammerhead opposite the flat striking surface
          (may have various shapes)