underrealized

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*(H)reh₁-
13. Proto-Indo-European*(H)reh₁ís
14. Proto-Italic*reis
15. Classical Latinrēs
16. Proto-Indo-European*h₂el-
17. Proto-Indo-European*h₂élisder.?
18. Late Latinreālis
19. Old Frenchree
20. Middle Englishreal
21. Englishreal
22. Englishrealized
23. English todayunderrealized

From under- + realized.