Definition.com
Physis is the substance of things which have in themselves as such a source of movement.
Physis is the substance of things which have in themselves as such a source of movement.
Physis is a loosely organized power of clans organized around [mediating, timely] heroes, who like the Gods whoosh up at crucial moments and then subside.
Physis is not simply 'nature,' but, in a way that is truer to the greek experience of the world than the latin term, it means 'the sprouting and emerging of being from concealment'.