πολυωφελῶς
From LSJ
τὸ γὰρ πράττειν τοῦ λέγειν καὶ χειροτονεῖν ὕστερον ὂν τῇ τάξει, πρότερον τῇ δυνάμει καὶ κρεῖττόν ἐστιν (Demosthenes 3.15) → for action, even though posterior in the order of events to speaking and voting, is prior in importance and superior
Dutch (Woordenboekgrieks.nl)
πολυωφελῶς adv. van πολυωφελής.
Russian (Dvoretsky)
πολυωφελῶς: с большой пользой Xen., Arph.
