elastodynamic

The story

1. Proto-Indo-European*h₁elh₂-
2. Proto-Indo-European*h₁l̥h₂-tós
3. Ancient Greekἐλᾰστός (elăstós)
4. Englishelasto-
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. English todayelastodynamic

From elasto- + dynamic.