trophodynamics

The story

1. Proto-Hellenic*tʰrépʰō
2. Ancient Greekτρέφω (tréphō)
3. Ancient Greekτροφή (trophḗ)
4. Englishtropho-
5. Proto-Indo-European*dewh₂-
6. Proto-Hellenic*dunamai
7. Ancient Greekδῠ́νᾰμαι (dŭ́nămai)
8. Ancient Greekδύναμις (dúnamis)
9. Ancient Greekδυναμικός (dunamikós)
10. Frenchdynamique
11. Englishdynamic
12. Englishdynamics
13. English todaytrophodynamics

From tropho- + dynamics.