ἐθνικός

Matthew 5:47 ἐθνικοὶ Gentiles

And if you greet only your brothers, what are you doing more than others? Do not even Gentiles do the same?

Matthew 6:7 ἐθνικοί· pagans;

And when you pray, do not babble on like pagans, for they think that by their many words they will be heard.

Matthew 18:17 ἐθνικὸς pagan

If he refuses to listen to them, tell it to the church. And if he refuses to listen even to the church, regard him as you would a pagan or a tax collector.

3 John 1:7 ἐθνικῶν. Gentile [people].

For they went out on behalf of the Name, accepting nothing from the Gentiles.