nonagglutinative

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*gleyH-
19. Proto-Indo-European*glóh₁ytn̥
20. Proto-Italic*gloiten
21. Latinglūten
22. Latinglūtinō
23. Latinagglūtinō
24. Latinagglūtinātu
25. Englishagglutinate
26. Englishagglutinative
27. English todaynonagglutinative

From non- + agglutinative.