χρειῶδες

From LSJ

εἰς τὴν ἀγορὰν χειροτονεῖτε τοὺς ταξιάρχους καὶ τοὺς φυλάρχους, οὐκ ἐπὶ τὸν πόλεμον → you elect taxiarchs and phylarchs for the marketplace not for war

Source

Russian (Dvoretsky)

χρειῶδες: τό полезность, польза Plut., Luc.