ὠφέλιμος
From LSJ
ξυνῆλθεν ἀτταγᾶς τε καὶ νουμήνιος → birds of a feather flock together, the francolin and the new-moon bird get together
English (LSJ)
ον, rarely η, ον, Pl.Chrm.174d (dub. l.), R.607d:—
A helping, aiding, useful, serviceable, beneficial, sts. of persons, as Id.Men.98c, R.461b (Comp.), X.Mem.2.7.9: but more freq. of things, Th.2.46, etc.; τινι to one, E.Ion138 (lyr.), Th.4.44, 7.64, etc.; ἔς τι for a purpose, Id.3.68; πρὸς τὰς πολιτείας Pl.R.607d; ὑπέρ τινος X. Cyr.6.2.34; κρίνειν τι ὠ. Th.1.22; τὸ ὠ. as Subst., Pl.R.457d; τὸ ὑμῖν ὠ. Th.1.76, cf. E. l. c.: Comp. and Sup., -ώτερος, -ώτατος, Th.1.93, Pl.R.461b, Tht.179a. Adv. -μως X.Mem.4.4.1, Pl.Grg.470a, Chrm. 163c: Sup. -ώτατα X.Eq.6.1.