assent
From LSJ
P. and V. συγχωρεῖν, συναινεῖν (Plato), ἐπαινέω, ἐπαινεῖν, P. ὁμολογεῖν, V. συννεύειν.
assent to: P. and V. ἐπινεύειν (acc.), καταινεῖν (acc. or dat.), συγχωρεῖν (dat.), συναινεῖν (acc.) (Xen.), P. ὁμολογεῖν (dat.), προστίθεσθαι (dat.).