ἄμυξις
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)
εως, ἡ, (ἀμύσσω)
A tearing, rending, mangling, Orph.A.24, Ach.Tat.8.4; scarification, Antyll. ap. Orib.7.16.1; irritation, Cass. Pr.62.