nonagricultural

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. Middle Frenchagriculture
15. Proto-Indo-European*h₂eǵ-?
16. Proto-Indo-European*h₂éǵros
17. Proto-Italic*agros
18. Latinager
19. Proto-Indo-European*kʷelh₁-
20. Proto-Indo-European*kʷélh₁eti
21. Proto-Italic*kʷelō
22. Latincolō
23. Latincultūra
24. Latinagricultūra
25. Middle Englishagriculture
26. Englishagriculture
27. Proto-Indo-European*h₂el-
28. Proto-Indo-European*h₂élisder.?
29. Englishagricultural
30. English todaynonagricultural

From non- + agricultural.