#4913 συνήδομαι sunedomai {soon-ay'-dom-ahee}

 middle voice from G4862 and the base of G2237; TDNT - n/a; v

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

 1) to rejoice together with (another or others)
 2) in the NT once to rejoice or delight with one's self or inwardly

—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 - delight 1; 1

—Exhaustive Concordance (KJV Translation Frequency & Location)