nonrealistic

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*(H)reh₁-
15. Proto-Indo-European*(H)reh₁ís
16. Proto-Italic*reis
17. Classical Latinrēs
18. Proto-Indo-European*h₂el-
19. Proto-Indo-European*h₂élisder.?
20. Late Latinreālis
21. Old Frenchree
22. Middle Englishreal
23. Englishreal
24. Englishrealist
25. Englishrealistic
26. English todaynonrealistic

From non- + realistic.