αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
subs.
P. and V. ὄξος, τό.
Jar for vinegar: V. ὀξηρὸν ἄγγος (Soph., Frag.).