A.fighting along with, leagued or allied with, τινι A.Ch.2,19, Hdt.1.22, etc.: freq. abs. as Subst., ally, Sapph. 1.28 (fem.), etc.; and in pl. allies, Hdt.1.102, al., IG12.76.14, etc.; “ς. ἐπί τινα” X.An.5.5.22.
2. as a real Adj., of things, places, circumstances, “συμμάχῳ δορί” A.Eu.773; “αὐτὴ γὰρ ἡ γῆ ξ. κείνοις πέλει” Id.Pers.792; συντυχίη ἐπεγένετό τινι ς. Hdt.5.65; “νόμον ς. τῷ θέλοντι” Id.3.31; “τὸ εἰκὸς ς. μοί ἐστιν” Antipho 5.43; “τοῦ χωρίου τὸ δυσέμβατον ξύμμαχον γίγνεται” Th.4.10, cf. Hdt.4.129; “πολλά ἐστι τὰ σύμμαχα” X.An.2.4.7; “ς. ἔχειν τὸ δίκαιον” Lys.2.10; ὅρκοι καὶ ξυνθῆκαι ib. 62; “τάχος ς. εἰς τὸ πραχθῆναι” X.Cyr.3.2.4: c. gen. rei, “ἀρετὴ τῶν ἐν πολέμῳ ς. ἔργων” Id.Mem.2.1.32.
3. assistant (esp. messenger), POxy.1223.10 (iv A.D.), 904.4 (pl., v A.D.), etc.