The Collaborative International Dictionary
piend
Peen \Peen\, n. [Cf. G. pinne pane of a hammer.]
A round-edged, or hemispherical, end to the head of a hammer or sledge, used to stretch or bend metal by indentation.
The sharp-edged end of the head of a mason's hammer.
Wiktionary
piend
n. (alternative form of peen English)