φραδμοσύνη
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)
ἡ, poet. Noun,
A shrewdness, cunning, in dat. pl. φραδμοσύνῃς h.Ap.99, Hes.Op.245, Th.626, etc.; dat. sg. φραδμοσύνῃ A.R.2.647; cf. φρασμοσύνη.
German (Pape)
[Seite 1302] ἡ, Verstand, Einsicht, Geschicklichkeit, List; H. h. Apoll. 99; Hes. öfter im plur.
Greek (Liddell-Scott)
φραδμοσύνη: ἡ, ποιητ ὄνομα εὐφυΐα, νόησις, δεξιότης, ἐν τῇ δοτ. πληθ., φραδμοσύνῃσιν Ὑμν Ὁμ εἰς Ἀπόλλ. 99, Ἡσ. Ἔργ. κ. Ἡμ. 243, Θεογον. 626, κλπ.· ἐν τῷ ἑνικῷ φραδμοσύνῃ, Ἀπολλ. Ρόδ. Β. 647. ― Καθ’ Ἡσύχ.: «φραδμοσύνη· σκέψις, βουλή, νόησις».