ἐν πέτροισι πέτρον ἐκτρίβων → by grinding stone against stones
P. and V. ἄπειρος, Ar. and P. ἀπέραντος, V. μυρίος (also Plato but rare P.).
inconceivable: P. and V. ἀμήχανος; see immeasurable.
