ἐὰν ᾖς φιλομαθής, ἔσει πολυμαθής → if you are studious, you will become learned
P. and V. γραῦς, ἡ. πρεσβῦτις, ἡ (rare P.), γραῖα, ἡ (Plato, Lys. 205D, but rare P.), Ar. and P. γρᾴδιον, τό.