nonpathologically

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. Frenchpathologie
21. Englishpathology
22. Proto-Indo-European*h₂el-
23. Proto-Indo-European*h₂élisder.?
24. Englishpathological
25. Englishnonpathological
26. Englishnon-
27. Englishpathological
28. Englishpathologically
29. English todaynonpathologically

From nonpathological + -ly, or from non- + pathologically.