proto-differentiation

The story

1. Proto-Indo-European*per-der.?
2. Proto-Indo-European*pér
3. Proto-Indo-European*pró
4. Ancient Greekπρό (pró)
5. Ancient Greekπρῶτος (prôtos)
6. Ancient Greekπρωτο- (prōto-)
7. Englishproto-
8. Proto-Indo-European*dwóh₁
9. Proto-Indo-European*trísinflu.
10. Proto-Indo-European*d(w)is-
11. Proto-Italic*dis-
12. Latindis-
13. Proto-Indo-European*bʰer-
14. Proto-Indo-European*bʰéreti
15. Proto-Italic*ferō
16. Latinferō
17. Latindifferō
18. Latindifferēns
19. Latindifferentia
20. New Latindifferentiō
21. New Latindifferentiātus
22. Englishdifferentiate
23. Englishdifferentiation
24. English todayproto-differentiation

From proto- + differentiation.