benzalkonium

The story

1. Arabicلُبَان (lubān)
2. Proto-Indo-European*yew-
3. Proto-Indo-European*yéwos
4. Proto-Indo-Iranian*yáwas
5. Sanskritयव (yava)bor.?
6. Proto-Austronesian*zawa
7. Proto-Malayo-Polynesian*zawader.?
8. Old Javanesejawa
9. Old JavaneseJawi
10. Javaneseꦗꦮꦶ (jawi)
11. Arabicجَاوَة (jāwa)
12. Arabicـِيّ (-iyy)
13. Arabicجَاوِيّ (jāwiyy)
14. Arabicلُبَان جَاوِيّ (lubān jāwiyy)
15. Catalanbenjuí
16. Middle Frenchbenjoin
17. Englishbenzoin
18. Englishbenzo-
19. Englishbenz-
20. Proto-Indo-European*swel-der.?
21. Ancient Greekῡ̔́λη (hū́lē)
22. Englishbenzyl
23. Akkadian𒎎𒋆𒁉𒍣𒁕 (guḫlum)
24. Aramaicכוחלא (kuḥlā)
25. Arabicكُحْل (kuḥl)
26. Andalusian Arabicكُحُول (kuḥūl)
27. Medieval Latinalcoho
28. Middle Englishalcofol
29. Englishalc(ohol)
30. Englishalkyl
31. New Latinammōnium
32. Englishammonium
33. Englishonium
34. English todaybenzalkonium

From benz(yl) + alk(yl) + -onium (“quaternary ammonium compound”).