I. struggle against, prove a match for, τινί, esp. in war, Hdt.5.109, Th.6.72, X.Cyr.1.6.8, etc.; “ἀ. ταῖς παρασκεναῖς τινός” D.43.81; “πρὸς τοὺς βαρβάρους” Inscr.Prien.17.15, cf. Ep.Hebr.12.4.
2. generally, struggle, vie with, “τινί” Th.3.38; “περί τινος” And.4.2; “οἱ ἀνταγωνιζόμενοί τι” the parties in a lawsuit, X. Cyr.8.2.27; [“οἱ ἐλευθέριοι] οὐκ ἀ. περὶ τῶν χρημάτων” Arist.Rh. 1366b8.
3. act a part in rivalry with, “τινί” Plu.Dem.29.
II. as Pass., to be set against, “τινί” X.Oec.10.12.