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pin[pin 词源字典]

pin: [OE] Latin pinna (a probable relative of English fin) meant ‘wing, feather, pointed peak’. Amongst its derivatives were the diminutive pinnāculum, which has given English pinnacle [14] and, via French, panache [16] (which originally meant ‘plume of feathers’), pinnātus ‘feathered, winged’, source of English pinnate [18], and Vulgar Latin *pinniō, from which English gets pinion ‘wing’ [15]. Pinna itself was borrowed into Old English as pinn, and it was used for ‘peg’ (a sense which survives in various technical contexts); the application to a ‘small thin metal fastener’ did not emerge until the 14th century.

A pinafore [18] is etymologically a garment that is ‘pinned afore’, that is, ‘pinned to the front of a dress to protect it’.
=> fin, panache, pinafore, pinion, pinnacle[pin etymology, pin origin, 英语词源]