The story
- Proto-Indo-European*ḱe?
- Proto-Indo-European*ḱóm
- Proto-Italic*kom
- Proto-Italic*kom-
- Latincon-
- Latinco-
- Englishco-
- Englishvalent
- Englishcovalent
- Proto-Indo-European*leyg-
- Proto-Germanic*līką
- English todaycovalently
Etymology from Wiktionary, CC BY-SA 4.0.