etacepride

The story

1. Proto-Indo-European*h₂eydʰ-
2. Proto-Hellenic*áitʰō
3. Ancient Greekαἴθω (aíthō)
4. Ancient Greekᾱ̓ήρ (āḗr)influ.?
5. Ancient Greekαἰθήρ (aithḗr)
6. Latinaethēr
7. GermanÄther
8. GermanEther
9. Proto-Indo-European*swel-der.?
10. Ancient Greekῡ̔́λη (hū́lē)
11. GermanEthy
12. Englishethyl
13. Englisheth-
14. Proto-Indo-European*h₂eḱ-
15. Proto-Indo-European*h₂eḱéh₁yeti
16. Proto-Italic*akēō
17. Latinaceō
18. Latinacēscō
19. Latinacētum
20. Englishaceto-
21. Englishacet-
22. Ancient Greekῡ̔́λη (hū́lē)
23. Englishacetyl
24. Latinsulpur
25. Latinsulfur
26. Latinsulphur
27. Anglo-Normansulfre
28. Middle Englishsulphur
29. Englishsulf(ur)
30. Egyptianjmn
31. Ancient GreekᾸ̓́μμων (Ắmmōn)
32. LatinAmmōn
33. Latinammoniacus
34. Englishammonia
35. Proto-Indo-European*dʰeh₁-
36. Englishamide
37. Englishsulfamide
38. Englishsul(famoyl)
39. Proto-Indo-European*péh₂wr̥
40. Proto-Hellenic*pāwər
41. Ancient Greekπῦρ (pûr)
42. Ancient Greekπῠρρός (pŭrrhós)
43. GermanPyrro
44. Englishpyrrole
45. Englishpyrrolidine
46. Englishpyr(rolidinyl)
47. Arabicلُبَان (lubān)
48. Proto-Indo-European*yew-
49. Proto-Indo-European*yéwos
50. Proto-Indo-Iranian*yáwas
51. Sanskritयव (yava)bor.?
52. Proto-Austronesian*zawa
53. Proto-Malayo-Polynesian*zawader.?
54. Old Javanesejawa
55. Old JavaneseJawi
56. Javaneseꦗꦮꦶ (jawi)
57. Arabicجَاوَة (jāwa)
58. Arabicـِيّ (-iyy)
59. Arabicجَاوِيّ (jāwiyy)
60. Arabicلُبَان جَاوِيّ (lubān jāwiyy)
61. Catalanbenjuí
62. Middle Frenchbenjoin
63. Englishbenzoin
64. Englishbenzo-
65. Englishbenz-
66. Englishamide
67. English(benzam)ide
68. Englishsulpiride
69. English todayetacepride

From eth- + ace(tyl) + -pride (“sulpiride derivative”).