αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
ion. c. ἡμέρα.
pl. ἡμέραι: day; other forms than the nom. are supplied by ἦμαρ.
ἡμέρη: ἡ эп.-ион. = ἡμέρα.