diazepam

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. Proto-Indo-European*dwóh₁
20. Proto-Indo-European*dwi-
21. Proto-Hellenic*dwi-
22. Ancient Greekδῐ- (dĭ-)
23. Latindi-
24. Englishdi-
25. Proto-Indo-European*né
26. Proto-Indo-European*n̥-
27. Proto-Hellenic*ə-
28. Ancient Greekᾰ̓- (ă-)
29. Proto-Indo-European*gʷeyh₃-
30. Proto-Indo-European*gʷih₃wós
31. Proto-Indo-European*gʷíh₃weti
32. Proto-Hellenic*gʷyṓw-ō
33. Proto-Hellenic*d͏̌ṓwō
34. Ancient Greekζώω (zṓō)
35. Ancient Greekζῶ (zô)
36. Ancient Greekζωή (zōḗ)
37. Frenchazote
38. Englishazote
39. Englishaz-
40. Proto-Afroasiatic*sṗɣ?
41. Proto-Semitic*šabʕ-bor.?
42. Proto-Indo-European*septḿ̥
43. Proto-Hellenic*heptə́
44. Ancient Greekἑπτᾰ́ (heptắ)
45. Frenchhepta-
46. Englishazepine
47. Englishdiazepine
48. English(benzo)diazep(ine)
49. Egyptianjmn
50. Ancient GreekᾸ̓́μμων (Ắmmōn)
51. LatinAmmōn
52. Latinammoniacus
53. Englishammonia
54. Proto-Indo-European*dʰeh₁-
55. Englisham(ide)
56. English todaydiazepam

From (benzo)diazep(ine) + am(ide).