unaccommodating

The story

1. Proto-Indo-European*né
2. Proto-Indo-European*n̥-
3. Proto-Germanic*un-
4. Proto-West Germanic*un-
5. Old Englishun-
6. Middle Englishun-
7. Englishun-
8. Proto-Indo-European*h₂éd
9. Proto-Italic*ad
10. Proto-Italic*ad-
11. Latinad-
12. Proto-Indo-European*ḱe?
13. Proto-Indo-European*ḱóm
14. Proto-Italic*kom
15. Proto-Italic*kom-
16. Latincom-
17. Proto-Indo-European*med-
18. Proto-Indo-European*médos
19. Proto-Italic*medos
20. Latinmodus
21. Latincommodus
22. Latincommodum
23. Latincommodō
24. Latinaccommodō
25. Latinaccommodātus
26. Englishaccommodate
27. Englishaccommodating
28. English todayunaccommodating

From un- + accommodating.