thiofentanyl

The story

1. Proto-Indo-European*dʰewh₂-der.?
2. Ancient Greekθέειον (théeion)
3. Ancient Greekθεῖον (theîon)
4. Englishthio-
5. Proto-Indo-European*bʰeh₂-
6. Proto-Indo-European*bʰh₂nyéti
7. Proto-Hellenic*pʰáňňō
8. Ancient Greekφαίνω (phaínō)
9. Frenchphéno-
10. Proto-Indo-European*swel-der.?
11. Ancient Greekῡ̔́λη (hū́lē)
12. Frenchphényle
13. Englishphenyl
14. Proto-Indo-European*h₂eydʰ-
15. Proto-Hellenic*áitʰō
16. Ancient Greekαἴθω (aíthō)
17. Ancient Greekᾱ̓ήρ (āḗr)influ.?
18. Ancient Greekαἰθήρ (aithḗr)
19. Latinaethēr
20. GermanÄther
21. GermanEther
22. Ancient Greekῡ̔́λη (hū́lē)
23. GermanEthy
24. Englishethyl
25. Englishphen(yle)th(yl)
26. Proto-Indo-European*neyH-der.?
27. Sanskritनील॑ (nī́la)
28. Middle Persian𐭭𐭩𐭫 (nīl)
29. Arabicنِيل (nīl)
30. Portugueseanil
31. GermanAnilin
32. Englishaniline
33. Egyptianjmn
34. Ancient GreekᾸ̓́μμων (Ắmmōn)
35. LatinAmmōn
36. Latinammoniacus
37. Englishammonia
38. Proto-Indo-European*dʰeh₁-
39. Englishamide
40. Englishanil(ide)
41. Englishfentanyl
42. English todaythiofentanyl

From thio- + fentanyl.