Strong’s Greek
G1483 — ethnikos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἐθνικῶς
ethnikos — pronounced eth-nee-koce'
adverb from 1482; as a Gentile:--after the manner of Gentiles. see GREEK for 1482
1 occurrence in the KJV.
Galatians 2:14
But when I saw that they walked not uprightly according to the truth of the gospel, I said unto Peter before them all, If thou, being a Jew, livest after the manner of Gentiles, and not as do the Jews, why compellest thou the Gentiles to live as do the Jews?