vice-chairman

The story

1. Proto-Indo-European*weyk-
2. Latinvice
3. Englishvice-
4. Proto-Indo-European*ḱe?
5. Proto-Indo-European*ḱóm
6. Proto-Indo-European*ḱm̥-th₂der.?
7. Proto-Hellenic*kətá
8. Ancient Greekκατά (katá)
9. Proto-Indo-European*sed-
10. Proto-Indo-European*sedreh₂
11. Proto-Hellenic*hédrā
12. Ancient Greekἕδρα (hédra)
13. Ancient Greekκᾰθέδρᾱ (kăthédrā)
14. Latincathedra
15. Old Frenchchaiere
16. Middle Englishchayere
17. Englishchair
18. Proto-Indo-European*mon-
19. Proto-Germanic*mann-
20. Proto-West Germanic*mann
21. Old Englishmann
22. Middle Englishman
23. Englishchairman
24. English todayvice-chairman

From vice- + chairman.