προσμαρτυρέω
From LSJ
Ἔοικα γοῦν τούτου γε σμικρῷ τινι αὐτῷ τούτῳ σοφώτερος εἶναι, ὅτι ἃ μὴ οἶδα οὐδὲ οἴομαι εἰδέναι → I seem, then, in just this little thing to be wiser than this man at any rate, that what I do not know I do not think I know either
English (LSJ)
A bear witness in addition, π. τούτους εἶναι κληρονόμους Is.6.45; confirm by evidence, τῇ προκλήσει τὴν διαθήκην D.45.12, cf. ib.88; π. ταῦτά τινι Plu.Arist.25, etc.: c. dat., bear additional witness to, confirm a thing, τὰ πράγματα -εμαρτύρησε τοῖς λογισμοῖς Plb.3.89.4, cf. Plu.2.119e, etc.:—Pass., προσεμαρτυρεῖτο αὐτῷ ὅτι . . PCair.Zen.288.7 (iii B.C.), cf. S.E.M.7.212. 2 ascribe, πάντα τῷ θεῷ J.AJ5.8.9. II Astrol., to be also in aspect, Procl.Par.Ptol.249, Man.4.384.