μεσιτεύω mesiteúō

Meaning

to interpose (as arbiter), i.e (by implication) to ratify (as surety)

In the King James Version: confirm

Derivation: from G3316 (μεσίτης);

Where it is used

• Hebrews 6:17 So when God wanted to make the unchanging nature of His purpose very clear to the heirs of the promise, He guaranteed it with an oath.