αὐθέντημα
From LSJ
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
English (LSJ)
auctoramentum, Glossaria.
Spanish (DGE)
auctoramentum, Gloss.2.250.
German (Pape)
τό, eigene Macht, Unabhängigkeit, Sp.