τελειόω
"to make perfect, complete":
I. of things, "to make" it "perfect, complete, accomplish", Hdt., Thuc., etc.:—Pass. "to be accomplished", Hdt., Soph.; τελεωθέντων ἀμφοτέροισι "when" both parties "had their wishes accomplished", Hdt.:— of prophecies, "to be fulfilled", NTest.
II. of persons, "to bring" one "to perfection", Hdt.; τελειῶσαι λόχον "to make" the ambush "successful", Soph.:—Pass. "to attain perfection, come to the end of one's labours", id=Soph.: "to reach maturity", Plat.