ῥάχνος
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)
εος, τό, perh.
A cloak, PGen.80.7 (iv A.D.), PKlein.Form.407 (vi A.D.).
Greek Monolingual
-εος, τὸ, ΜΑ
μανδύας.
[ΕΤΥΜΟΛ. Αβέβαιης σημ. και ετυμολ.].