ἐπωφελής
From LSJ
ἤ με φίλει καθαρὸν θέμενος νόον, ἤ μ' ἀποειπών ἐχθαιρ' ἀμφαδίην νεῖκος ἀειράμενος → either love me with a pure heart, or reject and hate me, and openly pick a fight
English (LSJ)
ές,
A helpful, useful, Sever. Clyst.p.17 D., Poll.5.136, Cod.Just.1.2.17.1 ; ἡμῖν Hierocl.in CA11p.441M. Adv. -λῶς Poll.5.135, Vett. Val.165.18, Them.Or.21.252a,22.278c.
German (Pape)
[Seite 1016] ές, hülfreich, nützlich, Schol. Ar. Plut. 88. – Adv., Themist. u. a. Sp.