Arete

Etymology

Greek "arete" meant excellence of any kind: a knife’s arete is its edge, a horse’s its speed. In Homer it was martial prowess; in later ethics it became human virtue, the excellence proper to a person. It is kin to "aristos," best, which gives us "aristocracy."

noun · /ah-ruh-TAY/
Excellence or virtue understood as a thing performing its proper function superbly.
What it names
Excellence as fitness-for-function rather than moral goodness — a blade’s arete is its sharpness.
Example
The coach spoke less about winning than about arete — each player becoming fully, excellently what a player can be.
Related idea
The Greek ideal behind eudaimonia, since flourishing was thought to flow from exercising one’s arete; the modern virtuoso is arete made audible.