The story
- Proto-Indo-European*ḱe?
- Proto-Indo-European*ḱóm
- Proto-Italic*kom
- Proto-Italic*kom-
- Latincon-
- Latinco-
- Englishco-
- Englishoperative
- Englishcooperative
- Proto-Indo-European*leyg-
- Proto-Germanic*līką
- English todaycooperatively
From cooperative + -ly.
Etymology from Wiktionary, CC BY-SA 4.0.