diaminocyclohexyl

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. Egyptianjmn
8. Ancient GreekᾸ̓́μμων (Ắmmōn)
9. LatinAmmōn
10. Latinammoniacus
11. Englishammonia
12. Englishamine
13. Englishamino-
14. Englishamino
15. Englishdiamino
16. Proto-Indo-European*kʷelh₁-redup.
17. Proto-Indo-European*kʷékʷlos
18. Proto-Hellenic*kʷókʷlos
19. Proto-Hellenic*kúklos
20. Ancient Greekκύκλος (kúklos)
21. Late Latincyclus
22. Middle Englishcicle
23. Englishcycle
24. Ancient Greekκύκλος (kúklos)
25. Ancient Greekκυκλῐκός (kuklĭkós)
26. Classical Latincyclicu
27. Middle Frenchcyclique
28. Frenchcyclique
29. Classical Latincyclicus
30. Englishcyclic
31. Englishcyclo-
32. Proto-Indo-European*swéḱs
33. Proto-Hellenic*hwéks
34. Ancient Greekἕξ (héx)
35. Ancient Greekἑξα- (hexa-)
36. Latinhexa-
37. Englishhexa-
38. Englishhex-
39. Englishhexane
40. Proto-Indo-European*swel-der.?
41. Ancient Greekῡ̔́λη (hū́lē)
42. Englishhexyl
43. Englishcyclohexyl
44. English todaydiaminocyclohexyl

From diamino + cyclohexyl.