alkoxyl

The story

1. Akkadian𒎎𒋆𒁉𒍣𒁕 (guḫlum)
2. Aramaicכוחלא (kuḥlā)
3. Arabicكُحْل (kuḥl)
4. Andalusian Arabicكُحُول (kuḥūl)
5. Medieval Latinalcoho
6. Middle Englishalcofol
7. Englishalcohol
8. Englishalk-
9. Proto-Indo-European*h₂eḱ-der.?
10. Ancient Greekὀξύς (oxús)
11. Proto-Indo-European*ǵenh₁-
12. Proto-Indo-European*ǵénh₁os
13. Proto-Hellenic*génos
14. Ancient Greekγένος (génos)
15. Frenchoxygène
16. Englishoxygen
17. Englishalkoxy
18. Proto-Indo-European*swel-der.?
19. Ancient Greekῡ̔́λη (hū́lē)
20. English todayalkoxyl

From alkoxy + -yl.