Αὐτάρκεια

Polybius [writes]: "the man is worthy of being praised and marvelled at, most of all for the self-sufficiency of his lifestyle. There was a certain self-taught philosophy involved in it which he displayed in the course of many deeds."¹
Also [sc. attested is the related verb] "I am self-sufficient" [au)tarkw=]; [used] with a dative.²