Where does “αρχάγγελος” come from?

αρχάγγελος (Greek) comes from Koine Greek ἀρχάγγελος, from Ancient Greek ἄγγελος, from Old Norse engill, from Old Saxon engil, from Proto-West Germanic angil, from Latin angelus — angel; messenger.

αρχάγγελος (Greek): archangel