pharmacodynamic

The story

1. Ancient Greekφάρμᾰκον (phármăkon)
2. Englishpharmaco-
3. Proto-Indo-European*dewh₂-
4. Proto-Hellenic*dunamai
5. Ancient Greekδῠ́νᾰμαι (dŭ́nămai)
6. Ancient Greekδύναμις (dúnamis)
7. Ancient Greekδυναμικός (dunamikós)
8. Frenchdynamique
9. Englishdynamic
10. English todaypharmacodynamic

From pharmaco- + dynamic.