αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
prŏfessus: a, um, Part. and P. a., from profiteor
prŏfessus,¹⁴ a, um, part. de profiteor || passivt, v. profiteor.
professus, a, um. part. v. profiteor. :: 承設。所承認者。Ex professo 當衆。明然。