nonfilial

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*dʰeh₁(y)-
15. Proto-Indo-European*dʰh₁ilyós
16. Proto-Italic*θīlios
17. Proto-Italic*fīlios
18. Latinfīlius
19. Proto-Indo-European*h₂el-
20. Proto-Indo-European*h₂élisder.?
21. Latinfīliālis
22. Middle Englishfilial
23. Englishfilial
24. English todaynonfilial

From non- + filial.