ἀπομυθεομαι
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
Spanish (DGE)
(ἀπομῡθεομαι) 1 disuadir μάλα γάρ τοι ἔγωγε πόλλ' ἀπεμυθεόμην Il.9.109.
2 defenderse con cuentos Stratt.79.