δοκησιδέξιος
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)
ον, clever in one's own conceit, Pherecr.154, Callias Com.27.
Spanish (DGE)
(δοκησῐδέξιος) -ον
que se considera a sí mismo inteligente εἴποι τις ἂν τῶν πάνυ δοκησιδεξίων Pherecr.163, cf. Call.Com.34.
German (Pape)
[Seite 653] sich selbst geschickt dünkend, Pherecr. bei Ath. III, 122 e; Callias com. bei Poll. 4, 9.