A.“-φήσω” Pl.Prt.357b, al.: aor. 1 “συνέφησα” Id.R.342e, Sph.236d, al.: aor. 2 συνέφην freq. in Pl. (v. infr.), Elean “συνέφα” Schwyzer 416.5:—assent, approve, or agree fully, A.Pr.40, S.Ph. 1310, etc.; “ξύμφημι κἀγώ” Id.El.1257; “ξ. δή σοι” Id.Aj.278, cf. E. Hipp.266 (anap.), Pl.Ti.72d, etc.
2. c. acc. rei, concede, agree to, grant, “ταῦτα . . πάντες ἄρα συνέφασαν” Id.Smp.177e, cf.Sph.247a, Prt. 330d, X.An.5.8.8, etc.: hence abs., σύμφημί (σοι) I grant you, Pl.R. 403c,608b; freq. in Platonic dialogue, σύμφαθι ἢ ἄπειπε say yes or no, ib.523a, cf.Grg.500e; “συνέφη” Id.Phd.102d, al.
3. c. acc. et inf., agree that . . , S.OT553, Pl.Lg.831b, etc.; ς. τῷ νόμῳ ὅτι καλός, = ς. τὸν νόμον καλὸν εἶναι, Ep.Rom.7.16.
4. c. inf. fut., promise, X.HG5.2.5.