tinidazole

The story

1. Proto-Indo-European*dʰewh₂-der.?
2. Ancient Greekθέειον (théeion)
3. Ancient Greekθεῖον (theîon)
4. Englishthio-
5. Englishthi-
6. Proto-Indo-European*médʰu
7. Proto-Hellenic*métʰu
8. Ancient Greekμέθυ (méthu)
9. Proto-Indo-European*swel-der.?
10. Ancient Greekῡ̔́λη (hū́lē)
11. GermanMethy
12. Englishme(thyl)
13. Egyptiannṯr
14. Egyptiannṯrj
15. Ancient Greekνῐ́τρον (nĭ́tron)
16. Englishnitro-
17. Egyptianjmn
18. Ancient GreekᾸ̓́μμων (Ắmmōn)
19. LatinAmmōn
20. Latinammoniacus
21. Englishammonia
22. Proto-Indo-European*dʰeh₁-
23. Englishamide
24. Englishimide
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. Englishazo-
40. Englishazole
41. Englishimidazole
42. Englishmetronidazole
43. English todaytinidazole

From thi- + -nidazole (“metronidazole derivative”).