oxazepam

The story

1. Proto-Indo-European*wed-
2. Proto-Indo-European*wódr̥
3. Proto-Hellenic*údōr
4. Ancient Greekῡ̆̔́δωρ (hū̆́dōr)
5. Ancient Greekὑδρο- (hudro-)
6. Frenchhydro-
7. Proto-Indo-European*ǵenh₁-
8. Proto-Indo-European*ǵénh₁os
9. Proto-Hellenic*génos
10. Ancient Greekγένος (génos)
11. Frenchhydrogène
12. Englishhydrogen
13. Proto-Indo-European*h₂eḱ-der.?
14. Ancient Greekὀξύς (oxús)
15. Ancient Greekγένος (génos)
16. Frenchoxygène
17. Englishoxygen
18. Proto-Indo-European*swel-der.?
19. Ancient Greekῡ̔́λη (hū́lē)
20. Englishhydroxyl
21. Englishhydroxy-
22. Arabicلُبَان (lubān)
23. Proto-Indo-European*yew-
24. Proto-Indo-European*yéwos
25. Proto-Indo-Iranian*yáwas
26. Sanskritयव (yava)bor.?
27. Proto-Austronesian*zawa
28. Proto-Malayo-Polynesian*zawader.?
29. Old Javanesejawa
30. Old JavaneseJawi
31. Javaneseꦗꦮꦶ (jawi)
32. Arabicجَاوَة (jāwa)
33. Arabicـِيّ (-iyy)
34. Arabicجَاوِيّ (jāwiyy)
35. Arabicلُبَان جَاوِيّ (lubān jāwiyy)
36. Catalanbenjuí
37. Middle Frenchbenjoin
38. Englishbenzoin
39. Englishbenzo-
40. Proto-Indo-European*dwóh₁
41. Proto-Indo-European*dwi-
42. Proto-Hellenic*dwi-
43. Ancient Greekδῐ- (dĭ-)
44. Latindi-
45. Englishdi-
46. Proto-Indo-European*né
47. Proto-Indo-European*n̥-
48. Proto-Hellenic*ə-
49. Ancient Greekᾰ̓- (ă-)
50. Proto-Indo-European*gʷeyh₃-
51. Proto-Indo-European*gʷih₃wós
52. Proto-Indo-European*gʷíh₃weti
53. Proto-Hellenic*gʷyṓw-ō
54. Proto-Hellenic*d͏̌ṓwō
55. Ancient Greekζώω (zṓō)
56. Ancient Greekζῶ (zô)
57. Ancient Greekζωή (zōḗ)
58. Frenchazote
59. Englishazote
60. Englishaz-
61. Proto-Afroasiatic*sṗɣ?
62. Proto-Semitic*šabʕ-bor.?
63. Proto-Indo-European*septḿ̥
64. Proto-Hellenic*heptə́
65. Ancient Greekἑπτᾰ́ (heptắ)
66. Frenchhepta-
67. Englishazepine
68. Englishdiazepine
69. English(benzo)diazep(ine)
70. Egyptianjmn
71. Ancient GreekᾸ̓́μμων (Ắmmōn)
72. LatinAmmōn
73. Latinammoniacus
74. Englishammonia
75. Proto-Indo-European*dʰeh₁-
76. Englisham(ide)
77. Englishdiazepam
78. English todayoxazepam

From (hydr)ox(y)- + -azepam (“diazepam derivative”).