πετρήεις
From LSJ
τὰ πρὸ Εὐκλείδου ἐξετάζειν → investigate what happened before the flood, investigate what happened in the distant past, investigate what happened before Euclid, investigate what happened before the year of Euclid
English (LSJ)
εσσα, εν,
A rocky, in Hom. always epith. of places, Αὐλίς, Πυθών, Καλυδών, Il.2.496,519,640; νῆσος Od.4.844; γλάφυ πετρῆεν Hes.Op.533. II haunting rocks, ἰουλίς AP7.504.5 (Leon.); ἠχώ APl.4.154 (Luc. or Arch.).