uneloquent

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*h₁éǵʰ
9. Proto-Indo-European*h₁éǵʰs
10. Proto-Italic*eks
11. Latinex
12. Latinex-
13. Proto-Indo-European*telkʷ-
14. Proto-Indo-European*tlokʷetor
15. Proto-Italic*tlokʷōr
16. Latinloquor
17. Latinēloquor
18. Latinēloquēn
19. Old Frencheloquent
20. Englisheloquent
21. English todayuneloquent

From un- + eloquent.