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
1. (για πτηνό) παύω να είμαι νεοσσός, αρχίζω να μεγαλώνω
2. (μτφ. για νέο άνθρωπο) απαιτώ ελευθερία.
[ΕΤΥΜΟΛ. < ξ(ε)- + πουλί].