Where does “αὐτάρκεια” come from?

αὐτάρκεια (Ancient Greek) comes from Ancient Greek αὐτάρκης, from Ancient Greek αὐτο-, from Ancient Greek αὐτός, from Proto-Indo-European h₂ew, from Proto-Indo-European ǵʰe — Postpositional intensifying particle: indeed, at any rate, in fact.

αὐτάρκεια (Ancient Greek): self-sufficiency