bodkin: [14] A bodkin was originally a small dagger, and only in the 18th century did it develop the perhaps more familiar sense ‘long blunt needle’. Initially it was a three-syllable word, spelled boidekyn, and its origins are mysterious. Most speculation has centred on Celtic as a source. Welsh bidog ‘dagger’ being cited (the -kin is no doubt a diminutive suffix). [bodkin etymology, bodkin origin, 英语词源]