ἐπωφελῶς
From LSJ
Πάντα ταῦτα ἐπείρασα ἐν τῇ σοφίᾳ: εἶπα Σοφισθήσομαι, καὶ αὐτὴ ἐμακρύνθη ἀπ' ἐμοῦ· κτλ. (Εcclesiastes 7:23f., LXX version) → I tried to give proof in wisdom of all those things; I said, I will be wise, but that wisdom was far from me ...
Translations
usefully
Bulgarian: полезно; Catalan: útilment; Czech: užitečně; Finnish: hyödyllisesti, käytännöllisesti; French: utilement; Greek: χρησίμως, αποτελεσματικά, εποικοδομητικά; Ancient Greek: ἐπωφελῶς, εὐχρήστως, λυσιτελούντως, λυσιτελῶς, ὀνησίμως, προὔργου, συμφερόντως, συμφόρως, χρειωδῶς, χρησίμως, χρηστικῶς, ὠφελίμως; Old English: nytlīċe; Portuguese: utilmente; Spanish: útilmente