The story
- Proto-Indo-European*h₂ew
- Proto-Indo-European*tó-
- Proto-Hellenic*autós
- Proto-Indo-European*h₂ew
- Ancient Greekαὖ (aû)
- Ancient Greekτόν (tón)
- Ancient Greekαὐτός (autós)
- Ancient Greekαὐτο- (auto-)
- Englishauto-
- Proto-Indo-European*h₂eǵ-
- Proto-Indo-European*h₂éǵeti
- Proto-Italic*agō
- Latinagō
- Ancient Greekἐνεργητικός (energētikós)
- Latināctīvu
- Old Frenchactif
- Middle Englishactyf
- Englishactive
- Englishactivate
- Englishactivation
- English todayautoactivation
From auto- + activation.
Etymology from Wiktionary, CC BY-SA 4.0.