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
-ου, τό• Alolema(s): Δέρα St.Byz.Dereon, Dera lugar en el monte Taigeto, en Laconia, donde había un santuario de Ártemis, Paus.3.20.7, St.Byz.