underacceptance

The story

1. Proto-Indo-European*h₁én
2. Proto-Indo-European*h₁entér
3. Proto-Indo-European*h₂én
4. Proto-Indo-European*dʰeh₁-?
5. Proto-Indo-European*(H)n̥dʰí
6. Proto-Indo-European*(H)n̥dʰér
7. Proto-Germanic*under
8. Proto-West Germanic*undar
9. Old Englishunder-
10. Middle Englishunder-
11. Englishunder-
12. Proto-Indo-European*h₂éd
13. Proto-Italic*ad
14. Proto-Italic*ad-
15. Latinad-
16. Proto-Indo-European*kap-
17. Proto-Indo-European*kapyéti
18. Proto-Italic*kapjō
19. Latincapiō
20. Latinaccipiō
21. Latinacceptāre
22. Old Frenchaccepter
23. Middle Frenchacceptance
24. Old Frenchaccepterder.?
25. Middle Englishaccepten
26. Englishaccept
27. Englishacceptance
28. English todayunderacceptance

From under- + acceptance.