Definition of "dynamis"

I have tried to explain the sense of dynamis fundamental to Aristotle's philosophy.

1962, William Keith Chambers Guthrie, A History of Greek Philosophy: Aristotle, an encounter, page 125

Heidegger deals in this text with Aristotle's attempt to explicate dynamis and energeia as one of manifold ways in which being is expressed.

1990, Arleen B. Dallery, Charles E. Scott, P. Holley Roberts, Crises in Continental Philosophy

Like Heidegger's Aristotle, Marcuse argues that being “reveals” itself in the relation of dynamis to energeia.

2004, Andrew Feenberg, Heidegger and Marcuse: The Catastrophe and Redemption of History