nonhydrostatic

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 Greekῠ̔δρο- (hŭdro-)
19. Englishhydro-
20. Proto-Indo-European*steh₂-
21. Proto-Indo-European*stísteh₂ti
22. Proto-Hellenic*hístāmi
23. Ancient Greekἵστημι (hístēmi)
24. Ancient Greekστᾰτῐκός (stătĭkós)
25. Latinstaticus
26. Englishstatic
27. Englishhydrostatic
28. English todaynonhydrostatic

From non- + hydrostatic.