συνδέομαι
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)
A join in entreating, c. dat., Plu.Caes.66; σ. τινὶ ἵνα . . Pl.Prm.136e; σ. τινὸς μὴ ποιεῖν τι beg of him also . ., Id.Ep.318c; τί τινος something of a person, D.36.57.
German (Pape)
[Seite 1006] (s. δέομαι), mit od. zugleich bedürfen, bitten; τινί, mit Einem, Plat. Parm. 136 e; μετὰ Θεοδότου συνεδεήθην σοῦ μὴ ποιεῖν ταῦτα, Ep. III, 318 c; Sp., wie Plut. Demetr. 51.
