μῶλυξ
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)
ῠκος, ὁ (Zacynth.), and μωλυρός, ά, όν, = sq., Hsch.
German (Pape)
[Seite 225] υκος, dor. = μῶλυς, nach Hesych. bei den Zakynthiern = ἀπαίδευτος.
Greek (Liddell-Scott)
μῶλυξ: -ῠκος, ὁ, Δωρ., καὶ μωλυρός, ά, όν, = τῷ μῶλυς, Ἡσύχ.