The story
- Proto-Italic*weg-o-der.?
- Proto-Indo-European*weǵ-
- Proto-Indo-European*woǵéyeti
- Proto-Italic*wogeōder.?
- Latinvegeō
- Latinvegetus
- Latinvegetāre, vegetō
- Latinvegetābilis
- Old Frenchvegetable
- Middle Englishvegetable
- Englishvegetable
- Englishvegetarian
- Latinō
- Old Frenchoh
- Middle Englisho
- EnglishO
- Middle Englisho
- Englishoh
- English todayveggo
From vegetarian + -o (“diminutive suffix”).
Etymology from Wiktionary, CC BY-SA 4.0.