PEEN
peen
(noun) the part of a hammerhead opposite the flat striking surface (may have various shapes)
Source: WordNet® 3.1
Etymology 1
Noun
peen (plural peens)
The (often spherical) end of the head of a hammer opposite the main hammering end.
Verb
peen (third-person singular simple present peens, present participle peening, simple past and past participle peened)
To shape metal by striking it, especially with a peen.
Etymology 2
Noun
peen (plural peens)
(slang) Penis.
Synonyms
• See also penis.
Anagrams
• neep, pene, pene-
Source: Wiktionary
Peen, n. Etym: [Cf. G. pinne pane of a hammer.]
(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.
Definition: To draw, bend, or straighten, as metal, by blows with the peen
of a hammer or sledge.
Source: Webster’s Unabridged Dictionary 1913 Edition