#2001 ἐπισχύω epischuo {ep-is-khoo'-o}

 from G1909 and G2480; TDNT - n/a; v

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

 1) to give additional strength, to make stronger
 2) to receive greater strength, grow stronger

—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 - be more fierce 1; 1

—Exhaustive Concordance (KJV Translation Frequency & Location)