The story
- Proto-Italic*wre-
- Latinre-
- Latinretrō
- Englishretro-
- Proto-Indo-European*ḱe?
- Proto-Indo-European*ḱóm
- Proto-Italic*kom
- Proto-Italic*kom-
- Latincon-
- Proto-Indo-European*ǵneh₃-
- Proto-Indo-European*ǵn̥h₃sḱéti
- Proto-Italic*gnōskō
- Latingnōscō
- Latincognōscō
- Latincognitiō
- Middle Englishcognicioun
- Englishcognition
- English todayretrocognition
Etymology from Wiktionary, CC BY-SA 4.0.