hexylresorcinol

The story

1. Proto-Indo-European*swéḱs
2. Proto-Hellenic*hwéks
3. Ancient Greekἕξ (héx)
4. Ancient Greekἑξα- (hexa-)
5. Latinhexa-
6. Englishhexa-
7. Englishhex-
8. Englishhexane
9. Proto-Indo-European*swel-der.?
10. Ancient Greekῡ̔́λη (hū́lē)
11. Englishhexyl
12. Ancient Greekῥητῑ́νη (rhētī́nē)
13. Latinrēsīna
14. Old Frenchrésine
15. Middle Englishresyn
16. Englishresin
17. Proto-Indo-European*h₂ew-
18. Proto-Indo-European*h₂ṓws
19. Proto-Italic*ausis
20. Latinauris
21. Latinauricula
22. Latinōricula
23. Italianoricello
24. Arabic[script needed] ('urjālla)influ.
25. Old Catalanorxella
26. Old Frenchorchel
27. Frenchorseille
28. Dutchorseille
29. New Latinorcina
30. Frenchorcine
31. Englishorcin
32. Akkadian𒎎𒋆𒁉𒍣𒁕 (guḫlum)
33. Aramaicכוחלא (kuḥlā)
34. Arabicكُحْل (kuḥl)
35. Andalusian Arabicكُحُول (kuḥūl)
36. Medieval Latinalcoho
37. Middle Englishalcofol
38. Englishalcohol
39. Englishorcinol
40. Englishresorcinol
41. English todayhexylresorcinol

From hexyl + resorcinol.