hydroxybenzene

The story

1. Ancient Greekὑδρο- (hudro-)
2. Frenchhydro-
3. Frenchhydrogène
4. Englishhydrogen
5. Proto-Indo-European*h₂eḱ-der.?
6. Ancient Greekὀξύς (oxús)
7. Proto-Indo-European*ǵenh₁-
8. Proto-Indo-European*ǵénh₁os
9. Proto-Hellenic*génos
10. Ancient Greekγένος (génos)
11. Frenchoxygène
12. Englishoxygen
13. Ancient Greekῡ̔́λη (hū́lē)
14. Englishhydroxyl
15. Englishhydroxy-
16. GermanBenzoe
17. GermanBenzin
18. Englishbenzine
19. Englishbenzene
20. English todayhydroxybenzene

From hydroxy- + benzene.