pharmacodiagnosis

The story

1. Ancient Greekφάρμᾰκον (phármăkon)
2. Englishpharmaco-
3. Proto-Indo-European*dwóh₁
4. Proto-Indo-European*trísinflu.
5. Proto-Indo-European*dwís
6. Ancient Greekδιά (diá)
7. Ancient Greekδια- (dia-)
8. Proto-Indo-European*ǵneh₃-
9. Proto-Indo-European*ǵn̥h₃sḱéti
10. Proto-Hellenic*gignṓskō
11. Ancient Greekγῐγνώσκω (gĭgnṓskō)
12. Ancient Greekδῐαγῐγνώσκω (dĭagĭgnṓskō)
13. Ancient Greekδῐᾰ́γνωσῐς (dĭắgnōsĭs)
14. Latindiagnōsis
15. Englishdiagnosis
16. English todaypharmacodiagnosis

From pharmaco- + diagnosis.