noradrenaline

The story

1. Proto-Indo-European*ǵneh₃-
2. Proto-Indo-European*ǵn̥h₃sḱéti
3. Proto-Hellenic*gignṓskō
4. Ancient Greekγιγνώσκω (gignṓskō)
5. Ancient Greekγνώμων (gnṓmōn)
6. Latinnorma
7. Proto-Indo-European*h₂el-
8. Proto-Indo-European*h₂élisder.?
9. Latinnōrmālis
10. Englishnormal
11. Englishnor-
12. Proto-Indo-European*h₂éd
13. Proto-Italic*ad
14. Proto-Italic*ad-
15. Latinad-
16. Englishad-
17. Latinrēn
18. Late Latinrēnāli
19. Englishrenal
20. Englishadrenal
21. Englishadrenaline
22. English todaynoradrenaline

From nor- + adrenaline.