The story
- Proto-Indo-European*né
- Proto-Indo-European*n̥-
- Proto-Germanic*un-
- Proto-West Germanic*un-
- Old Englishun-
- Middle Englishun-
- Englishun-
- Proto-Indo-European*h₂er-
- Proto-Indo-European*h₂(e)rmos
- Proto-Italic*armos
- Latinarma
- Latinarmō
- Latinarmātūra
- Old Frencharmeure
- Anglo-Normanarmure
- Middle Englisharmure
- Englisharmor
- Englisharmored
- English todayunarmored
Etymology from Wiktionary, CC BY-SA 4.0.