nondropsical

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*wed-
15. Proto-Indo-European*wódr̥
16. Proto-Hellenic*údōr
17. Ancient Greekῡ̆̔́δωρ (hū̆́dōr)
18. Ancient Greekῠ̔́δρωψ (hŭ́drōps)
19. Latinhydrōps
20. Late Latinhydropisia
21. Old Frenchydropisie
22. Middle Englishidropesie
23. Englishdropsy
24. Proto-Indo-European*h₂el-
25. Proto-Indo-European*h₂élisder.?
26. Englishdropsical
27. English todaynondropsical

From non- + dropsical.