οὐκ ἂν λάβοις παρὰ τοῦ μὴ ἔχοντος → you can't take from one who doesn't have, you can't squeeze blood out of a turnip, you can't get blood out of a turnip, you can't get blood from a stone, you can't get blood out of a stone
P. and V. πέτρα, ἡ, ἄκρα, ἡ, κρημνός, ὁ, V. σπιλάς, ἡ, ἀγμός, ὁ, λέπας, τό, Ar. and V. σκόπελος, ὁ.
ringed with cliffs, adj.: V. ἀμφίκρημνος.
