preactivity

The story

1. Proto-Indo-European*per-
2. Proto-Indo-European*preh₂-
3. Proto-Indo-European*préh₂i?
4. Proto-Italic*prai
5. Proto-Italic*prai-
6. Latinprae-
7. Middle Englishpre-
8. Englishpre-
9. Proto-Indo-European*h₂eǵ-
10. Proto-Indo-European*h₂éǵeti
11. Proto-Italic*agō
12. Latinagō
13. Ancient Greekἐνεργητικός (energētikós)
14. Latināctīvus
15. Latināctīvitās
16. Middle Frenchactivité
17. Englishactivity
18. English todaypreactivity

From pre- + activity.