oxidizable

The story

1. Proto-Indo-European*h₂eḱ-der.?
2. Ancient Greekὀξύς (oxús)
3. Proto-Indo-European*ǵenh₁-
4. Proto-Indo-European*ǵénh₁os
5. Proto-Hellenic*génos
6. Ancient Greekγένος (génos)
7. Frenchoxygène
8. Proto-Indo-European*h₂eḱ-
9. Proto-Indo-European*h₂eḱéh₁yeti
10. Proto-Italic*akēō
11. Latinaceō
12. Proto-Indo-European*dʰeh₁-
13. Latinacidu
14. Frenchacide
15. Frenchoxide
16. Englishoxide
17. Englishoxidize
18. English todayoxidizable

From oxidize + -able.