πρεσβεύω G4243
presbeúō · pres-byoo'-o · Verb
from the base of πρεσβύτερος; to be a senior, i.e. (by implication) act as a representative (figuratively, preacher):--be an ambassador.
2 Occurrences in the King James Bible
2 Corinthians 5:20Now then we are ambassadors for Christ, as though God did beseech you by us: we pray you in Christ’s stead, be ye reconciled to God.
Ephesians 6:20For which I am an ambassador in bonds: that therein I may speak boldly, as I ought to speak.