The story
- Proto-Indo-European*h₁éǵʰs
- Proto-Italic*eks
- Latinex
- Latinex-
- Middle Frenchex-
- Middle Englishex-
- Englishex-
- Proto-Indo-European*ǵneh₃-
- Proto-Indo-European*ǵn̥néh₃ti
- Proto-Germanic*kunnaną
- Proto-West Germanic*kunnan
- Old Englishcunnan
- Middle Englishconnen
- Englishcon
- English todayex-con
Etymology from Wiktionary, CC BY-SA 4.0.