ἡ γὰρ σιωπὴ τοῖς σοφοῖσιν ἀπόκρισις → silence, you see, is an answer for the wise (Menander)
or σίρις, ιδος, ἡ,= ξυρίς, EM209.35. II σίρις· ἀπαίδευτος, Hsch.