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
- Middle Frenchcoherent
- Englishcoherent
- Englishincoherent
- English todayincoherentness
From incoherent + -ness.
Etymology from Wiktionary, CC BY-SA 4.0.