Strong’s Greek
G2450 — Ioudaizo
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἰουδαΐζω
Ioudaizo — pronounced ee-oo-dah-id'-zo
from 2453; to become a Judaean, i.e. "Judaize":--live as the Jews. see GREEK for 2453
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?