Note that the English word was derived from Old French, not Modern French. And Old French noun boton/bouton (”bud”) is itself formed from the Old French verb b

Note that the English word was derived from Old French, not Modern French. And Old French noun boton/bouton (”bud”) is itself formed from the Old French verb boter/bouter, “to thrust.” It’s had a variety of meanings in French generally related to ”thing that pushes out.” Google Translate is not a very complete dictionary. You can find many more definitions in Trésor de la langue française informatisé : https://www.cnrtl.fr/definition/bouton https://www.cnrtl.fr/definition/bouton It means “projection” in the sense of ”bit that sticks out,” like its use in goldsmithing or for the foot at the bottom of a harp.