Meaning

noun a knife that can be fixed to the end of a rifle and used as a weapon

verb stab or kill someone with a bayonet

originEtymology tree French Bayonne Proto-Indo-European *-tós Proto-Italic *-tosder.? Late Latin -ittus Old French -et Middle French -et French -etder. French -ette French baïonnetteder. English bayonet From French baïonnette, named after the French town of Bayonne, where the plug bayonet was invented.

Etymology from Wiktionary, CC BY-SA 3.0