#2450 Ἰουδαΐζω Ioudaizo {ee-oo-dah-id'-zo}

 from G2453; TDNT - 3:356,372; v

—Greek Word Study (Transliteration-Pronunciation Etymology & Grammar)

 1) to adopt Jewish customs and rites, imitate the Jews, Judaise
    1a) one who observes the ritual law of the Jews

—Thayer's (New Testament Greek-English Lexicon)

—Strong's (Greek Dictionary of the New Testament)

—NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries

 AV - to live as do the Jews 1; 1

—Exhaustive Concordance (KJV Translation Frequency & Location)