πολυωφελῶς
From LSJ
πολλὰ μεταξὺ πέλει κύλικος καὶ χείλεος ἄκρου → there is many a slip twixt cup and lip, there's many a slip twixt cup and lip, there's many a slip 'twixt cup and lip, there's many a slip twixt the cup and the lip, there's many a slip 'twixt the cup and the lip
Dutch (Woordenboekgrieks.nl)
πολυωφελῶς adv. van πολυωφελής.
Russian (Dvoretsky)
πολυωφελῶς: с большой пользой Xen., Arph.
