benzylhydantoin

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. Proto-Indo-European*wed-
24. Proto-Indo-European*wódr̥
25. Proto-Hellenic*údōr
26. Ancient Greekῡ̆̔́δωρ (hū̆́dōr)
27. Ancient Greekὑδρο- (hudro-)
28. Frenchhydro-
29. Proto-Indo-European*ǵenh₁-
30. Proto-Indo-European*ǵénh₁os
31. Proto-Hellenic*génos
32. Ancient Greekγένος (génos)
33. Frenchhydrogène
34. Englishhydrogen
35. Englishhydrogenation
36. Ancient Greekᾰ̓λλᾶς (ăllâs)
37. Englishallanto-
38. Englishallantoin
39. Englishhydantoin
40. English todaybenzylhydantoin

From benzyl + hydantoin.