συνωφελέω,
A. join in aiding, αὑτούς
X. Mem. 3.5.16
; τὴν γῆν
Id. Oec. 18.2
, etc.;τινὰ εἴς τιib. 2.14 ; rarelyτινι, S. Ph. 871 : abs.,to be of useorassist 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 .