Strong’s Greek
G2452 — Ioudaikos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
Ἰουδαϊκός
Ioudaikos — pronounced ee-oo-dah-ee-koce'
adverb from 2451; Judaically or in a manner resembling a Judaean:--as do the Jews. see GREEK for 2451
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?