ὑπερώιος

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

Source

Greek (Liddell-Scott)

ὑπερώιος: -α, -ον, ἴδε ὑπερῷος.