συνωφελέω

A. join in aiding, αὑτούς X. Mem. 3.5.16; τὴν γῆν Id. Oec. 18.2, etc.; τινὰ εἴς τι ib.2.14; rarely τινι, S. Ph. 871: abs., to be of use or assist together, ἔν τισι Hp. Art. 18, cf. Supp.Epigr. 3.583.13 (Olbia, ii/iii A.D.); εἴς τι X. An. 3.2.27:—Pass., derive profit together, Lys. 12.93.