methimazole

The story

1. Englishmeth-
2. Proto-Indo-European*dʰewh₂-der.?
3. Ancient Greekθέειον (théeion)
4. Ancient Greekθεῖον (theîon)
5. Englishthio-
6. Englishthi-
7. Egyptianjmn
8. Ancient GreekᾸ̓́μμων (Ắmmōn)
9. LatinAmmōn
10. Latinammoniacus
11. Englishammonia
12. Proto-Indo-European*dʰeh₁-
13. Englishamide
14. Englishimide
15. Proto-Indo-European*né
16. Proto-Indo-European*n̥-
17. Proto-Hellenic*ə-
18. Ancient Greekᾰ̓- (ă-)
19. Proto-Indo-European*gʷeyh₃-
20. Proto-Indo-European*gʷih₃wós
21. Proto-Indo-European*gʷíh₃weti
22. Proto-Hellenic*gʷyṓw-ō
23. Proto-Hellenic*d͏̌ṓwō
24. Ancient Greekζώω (zṓō)
25. Ancient Greekζῶ (zô)
26. Ancient Greekζωή (zōḗ)
27. Frenchazote
28. Englishazote
29. Englishazo-
30. Englishazole
31. English(i)m(id)azole
32. English todaymethimazole

From meth- + thi- + (i)m(id)azole.