Strong's Exhaustive Concordance dictionaries from openscriptures/strongs. CC BY-SA 4.0 / Public Domain. Derived from James Strong, S.T.D., LL.D., 1890/1894.
συμμαρτυρέωsymmartyreo
Short Definition
to testify jointly
Strong’s Definition
to testify jointly, i.e. corroborate by (concurrent) evidence