The story
- Proto-Indo-European*né
- Proto-Indo-European*n̥-
- Proto-Italic*n̥-
- Latinin-
- Middle Englishin-
- Englishin-
- Proto-Indo-European*ḱe?
- Proto-Indo-European*ḱóm
- Proto-Italic*kom
- Proto-Italic*kom-
- Latincon-
- Latinhaereō
- Latincohaereō
- Latincohaerēns
- Latincohaerentia
- Middle Frenchcoherence
- Englishcoherence
- English todayincoherence
From in- + coherence, formed on model of Italian incoerenza.
Etymology from Wiktionary, CC BY-SA 4.0.