ἐκ πολλῶν συγκεῖσθαι

From LSJ

μηδὲν κοτυλίζειν, ἀλλὰ καταπάττειν χύδην → not to sell by the cupful, but to dole out indiscriminately | not to sell by retail but wholesale

Source

Greek > English (Woodhouse)

be made up of many ingredients