nonfantastic

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*bʰeh₂-
15. Proto-Indo-European*bʰh₂nyéti
16. Proto-Hellenic*pʰáňňō
17. Ancient Greekφαίνω (phaínō)
18. Ancient Greekφαντάζω (phantázō)
19. Ancient Greekφανταστικός (phantastikós)
20. Late Latinphantasticus
21. Middle Frenchfantastique
22. Englishfantastic
23. English todaynonfantastic

From non- + fantastic.