nondynamical

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*dewh₂-
15. Proto-Hellenic*dunamai
16. Ancient Greekδῠ́νᾰμαι (dŭ́nămai)
17. Ancient Greekδύναμις (dúnamis)
18. Ancient Greekδυναμικός (dunamikós)
19. Frenchdynamique
20. Englishdynamic
21. Proto-Indo-European*h₂el-
22. Proto-Indo-European*h₂élisder.?
23. Englishdynamical
24. English todaynondynamical

From non- + dynamical.