neuroactivity

The story

1. Proto-Indo-European*(s)neh₁-
2. Proto-Indo-European*snéh₁wr̥
3. Ancient Greekνεῦρον (neûron)
4. Ancient Greekνευρο- (neuro-)
5. Englishneuro-
6. Proto-Indo-European*h₂eǵ-
7. Proto-Indo-European*h₂éǵeti
8. Proto-Italic*agō
9. Latinagō
10. Ancient Greekἐνεργητικός (energētikós)
11. Latināctīvus
12. Latināctīvitās
13. Middle Frenchactivité
14. Englishactivity
15. English todayneuroactivity

From neuro- + activity.