δια-μαρτύρομαι, depon., of Ionic origin, intensive of the simple μαρτύρομαι, q.v.,
[in LXX chiefly for עוּד hi., usually c. dat. pers., De 4:268:19, I Ki 8:9, al.;]
solemnly to protest: Lk 16:28, Ac 2:408:2510:4218:520:21, 23, 2423:1128:23, I Th 4:6, He 2:6; in adjuration, seq. ἐνώπιον τ. θεοῦ, I Ti 5:21, II Ti 2:144:1 (Cremer, 415).†