nonpathologic

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. Ancient Greekπάσχω (páskhō)
15. Ancient Greekπᾰ́θος (pắthos)
16. Proto-Indo-European*leǵ-
17. Proto-Indo-European*lóǵos
18. Proto-Hellenic*lógos
19. Ancient Greekλόγος (lógos)
20. Ancient Greekπαθολογίᾱ (pathologíā)
21. Ancient Greekπᾰθολογῐκός (păthologĭkós)
22. Englishpathologic
23. English todaynonpathologic

From non- + pathologic.