#4934 συντίθεμαι [συντίθημι] suntithemai {soon-tith'-em-ahee}

 middle voice from G4862 and G5087; TDNT - n/a; v

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

 1) to put together with, to place together, to join together
    1a) to place in one's mind
        1a1) to resolve, determine
        1a2) to make an arrangement, to engage
    1b) to assent to, to agree to

—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 - agree 2, covenant 1, assent 1; 4

—Exhaustive Concordance (KJV Translation Frequency & Location)