dihydropyrazole

The story

1. Proto-Indo-European*dwóh₁
2. Proto-Indo-European*dwi-
3. Proto-Hellenic*dwi-
4. Ancient Greekδῐ- (dĭ-)
5. Latindi-
6. Englishdi-
7. Proto-Indo-European*wed-
8. Proto-Indo-European*wódr̥
9. Proto-Hellenic*údōr
10. Ancient Greekῡ̆̔́δωρ (hū̆́dōr)
11. Ancient Greekῠ̔δρο- (hŭdro-)
12. Englishhydro-
13. Englishdihydro
14. Proto-Indo-European*péh₂wr̥
15. Proto-Hellenic*pāwər
16. Ancient Greekπῦρ (pûr)
17. Latinpyr
18. Englishpyro-
19. Englishpyr-
20. Proto-Indo-European*né
21. Proto-Indo-European*n̥-
22. Proto-Hellenic*ə-
23. Ancient Greekᾰ̓- (ă-)
24. Proto-Indo-European*gʷeyh₃-
25. Proto-Indo-European*gʷih₃wós
26. Proto-Indo-European*gʷíh₃weti
27. Proto-Hellenic*gʷyṓw-ō
28. Proto-Hellenic*d͏̌ṓwō
29. Ancient Greekζώω (zṓō)
30. Ancient Greekζῶ (zô)
31. Ancient Greekζωή (zōḗ)
32. Frenchazote
33. Englishazote
34. Englishazo-
35. Englishazole
36. Englishpyrazole
37. English todaydihydropyrazole

From dihydro + pyrazole.