amphidynamic

The story

1. Proto-Indo-European*h₂ent-
2. Proto-Indo-European*h₂énts?
3. Proto-Indo-European*h₂m̥bʰi
4. Ancient Greekἀμφίς (amphís)
5. Englishamphi-
6. Proto-Indo-European*dewh₂-
7. Proto-Hellenic*dunamai
8. Ancient Greekδῠ́νᾰμαι (dŭ́nămai)
9. Ancient Greekδύναμις (dúnamis)
10. Ancient Greekδυναμικός (dunamikós)
11. Frenchdynamique
12. Englishdynamic
13. English todayamphidynamic

From amphi- + dynamic.