Where does “εὐαγγελίζομαι” come from?

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

εὐαγγελίζομαι (Ancient Greek): present middle indicative first-person singular...