nonuniform

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*h₁óynos
15. Proto-Italic*oinos
16. Old Latinoinos
17. Latinūnus
18. Latinūni-
19. Ancient Greekμορφή (morphḗ)der.?
20. Latinfōrma
21. Latinuniformis
22. Middle Frenchuniforme
23. Englishuniform
24. English todaynonuniform

From non- + uniform.