alkyltransferase

The story

1. Akkadian𒎎𒋆𒁉𒍣𒁕 (guḫlum)
2. Aramaicכוחלא (kuḥlā)
3. Arabicكُحْل (kuḥl)
4. Andalusian Arabicكُحُول (kuḥūl)
5. Medieval Latinalcoho
6. Middle Englishalcofol
7. Englishalc(ohol)
8. Proto-Indo-European*swel-der.?
9. Ancient Greekῡ̔́λη (hū́lē)
10. Englishalkyl
11. Proto-Indo-European*terh₂-
12. Proto-Indo-European*térh₂t
13. Proto-Indo-European*tr̥h₂ónts
14. Proto-Indo-European*tr̥h₂n̥ts
15. Proto-Italic*trāns
16. Proto-Italic*trāns-
17. Latintrāns-
18. Proto-Indo-European*bʰer-
19. Proto-Indo-European*bʰéreti
20. Proto-Italic*ferō
21. Latinferō
22. Latintrānsferō
23. Englishtransfer
24. Proto-Indo-European*dwóh₁
25. Proto-Indo-European*trísinflu.
26. Proto-Indo-European*dwís
27. Ancient Greekδιά (diá)
28. Ancient Greekδῐᾰ- (dĭă-)
29. Proto-Indo-European*steh₂-
30. Proto-Indo-European*stísteh₂ti
31. Proto-Hellenic*hístāmi
32. Ancient Greekῐ̔́στημῐ (hĭ́stēmĭ)
33. Ancient Greekδῐῐ̈́στημῐ (dĭĭ̈́stēmĭ)
34. Ancient Greekδῐᾰ́στᾰσῐς (dĭắstăsĭs)
35. Englishdiastase
36. Englishtransferase
37. English todayalkyltransferase

From alkyl + transferase.