bretylium

The story

1. Ancient Greekβρῶμος (brômos)
2. Frenchbrome
3. Englishbrome
4. Englishbromine
5. Englishbromo-
6. Arabicلُبَان (lubān)
7. Proto-Indo-European*yew-
8. Proto-Indo-European*yéwos
9. Proto-Indo-Iranian*yáwas
10. Sanskritयव (yava)bor.?
11. Proto-Austronesian*zawa
12. Proto-Malayo-Polynesian*zawader.?
13. Old Javanesejawa
14. Old JavaneseJawi
15. Javaneseꦗꦮꦶ (jawi)
16. Arabicجَاوَة (jāwa)
17. Arabicـِيّ (-iyy)
18. Arabicجَاوِيّ (jāwiyy)
19. Arabicلُبَان جَاوِيّ (lubān jāwiyy)
20. Catalanbenjuí
21. Middle Frenchbenjoin
22. Englishbenzoin
23. Englishbenzo-
24. Englishbenz-
25. Proto-Indo-European*swel-der.?
26. Ancient Greekῡ̔́λη (hū́lē)
27. Englishbenzyl
28. Englishbromobenzyl
29. Proto-Indo-European*h₂eydʰ-
30. Proto-Hellenic*áitʰō
31. Ancient Greekαἴθω (aíthō)
32. Ancient Greekᾱ̓ήρ (āḗr)influ.?
33. Ancient Greekαἰθήρ (aithḗr)
34. Latinaethēr
35. GermanÄther
36. GermanEther
37. Ancient Greekῡ̔́λη (hū́lē)
38. GermanEthy
39. Englishethyl
40. English todaybretylium

From br(omobenzyl) + ethyl + -ium (“quaternary ammonium compound”).