αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
ἀπευδοκέω: ἔρχομαι εἰς ἀπελπισμόν, ἀπογινώσκω, ἀπελπίζω, τοῦτο καὶ ἡμᾶς μάλιστα ἀπευδοκεῖν τῆς σωτηρίας ποιεῖ Ἀθανάσ. τ. 1. σ. 1133C.