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
P. and V. μνημεῖον, τό, V. μνῆμα, τό.
memento V 0 0 PRES ACTIVE IMP 2 S TRANS :: remember; be mindful of