choriogonadotropin

The story

1. Ancient Greekχόρῐον (khórĭon)
2. Englishchorio-
3. Proto-Indo-European*ǵenh₁-redup.
4. Proto-Indo-European*ǵíǵn̥h₁eti
5. Proto-Hellenic*gígnomai
6. Ancient Greekγίγνομαι (gígnomai)
7. Ancient Greekγονή (gonḗ)
8. New Latingonadēs
9. Englishgonad
10. Englishgonado-
11. Proto-Indo-European*trep-
12. Ancient Greekτρέπω (trépō)
13. Ancient Greekτρόπος (trópos)
14. Latintropus
15. Englishgonadotrope
16. Englishgonado-
17. Ancient Greekτρέπω (trépō)
18. Ancient Greekτροπή (tropḗ)
19. Ancient Greekτροπῐκός (tropĭkós)
20. Englishgonadotropin
21. English todaychoriogonadotropin

From chorio- + gonadotropin.