nonsocial

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*sekʷ-
15. Proto-Indo-European*sokʷéh₂
16. Proto-Indo-European*sokʷh₂ṓy
17. Proto-Indo-European*sokʷyós
18. Proto-Italic*sokjos
19. Latinsokios
20. Latinsocius
21. Proto-Indo-European*h₂el-
22. Proto-Indo-European*h₂élisder.?
23. Latinsociāli
24. Middle Frenchsocia
25. Englishsocial
26. English todaynonsocial

From non- + social.