A.“συναγωνιξάμην” Delph.3(3).126, etc.:— contend along with, share in a contest, τινι with one, Ar.Th.1061, cf. Antipho 5.93, Th.1.143, etc.; “τινὶ πρὸς τοὺς πολεμίους” Pl.Alc.1.119e; “ἀλλήλοις ἐφ᾽ ἡμᾶς” D.43.10; “τινὶ ἐν ταῖς προσευχαῖς” Ep.Rom.15.30; “ς. ἐν μάχῃ” Marm.Par.63: c.acc. cogn., “ἀγῶνα” SIG711 L 29 (Delph., ii B.C.); “μάχας” OGI280.3 (Pergam., iii B.C.).
2. aid, succour, τινι D.21.190; τινί τι one in a thing, Id.18.25, 30.31; τινὶ πρός τι one towards a thing, Id.18.20; “εἴς τι” D.H.4.4, Michel 452 (iv/iii B.C.): generally, assist, “τῇ διατροπῇ” Metrod.Herc.831.19; “μετὰ σοῦ κοινῇ” D.48.43.
3. abs., fight on the same side, “οἱ ξυναγωνιούμενοι” Th.5.109, cf. 1.123, X.Cyr.4.5.49, etc.; of the Tragic chorus, join in the action, Arist.Po.1456a26:—Act. -ίζω, dub.l. in Nic.Dam.Fr.130.18 J.