θηλύπους
From LSJ
αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
English (LSJ)
ποδος, ὁ, ἡ, θ. βάσις the tread
A of female foot, [E.]IA421.
German (Pape)
[Seite 1207] βάσις, Tritt eines Weiberfußes, Eur. I. A. 421.