ἔκπωτις
From LSJ
εἰς πέλαγος σπέρµα βαλεῖν καὶ γράµµατα γράψαι ἀµφότερος µόχθος τε κενὸς καὶ πρᾶξις ἄκαρπος → throwing seeds and writing letters at sea are both a vain and fruitless endeavor
English (LSJ)
ιδος, ἡ, = ἄμπωτις, Cat.Cod.Astr.1.137(pl.).
Spanish (DGE)
-εως, ἡ
marea baja, bajamar Iul.Laod. en Cat.Cod.Astr.1.137 (plu.).