ἐπιμαρτυρέω G1957
epimartyréō · ep-ee-mar-too-reh'-o · Verb
from ἐπί and μαρτυρέω; to attest further, i.e. corroborate:--testify.
1 Occurrence in the King James Bible
1 Peter 5:12By Silvanus, a faithful brother unto you, as I suppose, I have written briefly, exhorting, and testifying that this is the true grace of God wherein ye stand.