ὠφέλῐμος -ον [ὠφελέω] useful,
helpful, beneficial, profitable, of things Thuc. 2.46 etc.; ▶
τινι to s.o. Eur.
Ion 138 Thuc. 4.44.1, 7.64.2; ▶ ἔς τι for sthg. Thuc. 3.68.4; ὑπὲρ τοῦ κοινοῦ for the common good Xen. Cyr. 6.2.34; πρὸς τὰς πολιτείας to the governments Plat. Rp. 607d | subst. τὸ ὠφέλιμον that which is
useful Plat.
Rp. 457d; τὸ ὑμῖν ὠ. your interest Thuc.
1.76.1 ‖ s.times of pers. Plat. Men. 98c, Rp. 461b (compar.) Xen.
Mem. 2.7.9 ‖ compar. -ώτερος Thuc. 1.91.6 | superl.
-ώτατος Plat. Theaet. 179a fem. -η Plat. Rp. 607d ♦ adv. ὠφελίμως usefully, in a useful way Xen. Mem. 4.4.1 Plat. Gorg. 470a ‖ superl. -ώτατα Xen. Hip. 6.1. (Franco
Montanari, The Brill Dictionary of Ancient Greek [Leiden: Brill, 2015],
S.V. ὠφέλῐμος)