From Old English pinn 'peg,' probably borrowed from Latin pinna 'point, feather.'
A thin pointed piece of metal used for fastening things together.
From Old English pinn 'pin, peg, bolt,' from Proto-Germanic *pinnō, probably borrowed from Latin pinna 'feather, point, battlement.' The word was originally broader, meaning any peg or bolt, and narrowed to the thin pointed fastener by the 14th century. Key roots: pinna (Latin: "feather, point, pinnacle