The story
- Proto-Indo-European*ḱe?
- Proto-Indo-European*ḱóm
- Proto-Italic*kom
- Proto-Italic*kom-
- Latincon-
- Proto-Indo-European*teh₂g-
- Proto-Italic*tangō
- Latintangō
- Latincontingō
- Latincontiguus
- Proto-Indo-European*h₃ed-
- Proto-Indo-European*h₃édosder.?
- Englishcontiguous
- Proto-Indo-European*leyg-
- Proto-Germanic*līką
- English todaycontiguously
From contiguous + -ly.
Etymology from Wiktionary, CC BY-SA 4.0.