The story
- Proto-Indo-European*mey-
- Proto-Indo-European*móyni
- Proto-Italic*moini
- Latinmoene
- Latinmūniō
- Latinmūnitiōnem
- Middle Frenchmunition
- Middle Frenchamunition
- English todayammunition
From older French amunition, rebracketing of la munition (“the war supplies”) as l'amunition. Ultimately from Latin; see munition for more.
Etymology from Wiktionary, CC BY-SA 4.0.