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
ἀκονίτως, ἀκολάστως, ἀταλαιπώρως, ἀπόνως, ἀδρύφακτος, ἀσπουδεί, ἀσπουδί, ἀμογητί, ἀκοπωτί, ἀκονεί, ἀκονητί, ἀκονιτεί, ἀκονιτί, ἀσσκονικτεί, ἀνιδιτί, ἀνιδρωτί