agree, assent, covenant

Strong’s Dictionary of Greek Words:

Greek:
συντίθεμαι
Transliteration:
suntithemai
Phonic:
soon-tith’-em-ahee
Meaning:
middle voice from 4862 and 5087; to place jointly, i.e. (figuratively) to consent (bargain, stipulate), concur
KJV Usage:
agree, assent, covenant