The story
- Proto-Indo-European*né
- Proto-Indo-European*n̥-
- Proto-Italic*n̥-
- Latinin-
- Proto-Indo-European*h₂eǵ-
- Proto-Indo-European*h₂éǵeti
- Proto-Italic*agō
- Latinagō
- Ancient Greekἐνεργητικός (energētikós)
- Latināctīvus
- Latinināctīvu
- Frenchinactif
- Englishinactive
- Englishinactivate
- English todayinactivator
From inactivate + -or.
Etymology from Wiktionary, CC BY-SA 4.0.