nonaccumulation

The story

1. Proto-Indo-European*né
2. Proto-Germanic*ne
3. Proto-Indo-European*ís?
4. Proto-Indo-European*h₁óynos
5. Proto-Germanic*ainaz
6. Proto-Germanic*nainaz
7. Proto-West Germanic*nain
8. Old Englishnān
9. Middle Englishnon
10. Old Englishnān
11. Old Englishnān-
12. Middle Englishnon-
13. Englishnon-
14. Proto-Indo-European*h₂éd
15. Proto-Italic*ad
16. Proto-Italic*ad-
17. Latinad-
18. Proto-Indo-European*ḱewh₁-
19. Proto-Indo-European*ḱuh₁mósder.?
20. Latincumulus
21. Latincumulō
22. Latinaccumulō
23. Latinaccumulātiō
24. Middle Frenchaccumulation
25. Latinaccumulātiō
26. Middle Englishacumulacyon
27. Englishaccumulation
28. English todaynonaccumulation

From non- + accumulation.