A.speak against or in answer, gainsay, c. dat., S.OC999, etc.; “ἀ. τινὶ δεομένῳ” Th.1.136: abs., “οὐδὲν ἀντειπεῖν ἔχω” A.Pr.51; ἀ. πρός τινα or τι, Th.3.61, X.HG3.3.3; oppose, Pl.Thg.131a; ἀ. ὑπέρ τινος speak in one's defence, Ar.Th.545: c. acc. cogn., ἀ. ἔπος utter a word of contradiction, E.IA1391; δύο λόγω περὶ τῶν αὐτῶν ἀντειπεῖν speak on both sides of a question, Isoc.10.1; “τούτῳ ἂν δίκαιον λόγον ἀντείποιμι” Pl.Ap.28b.
2. κακῶς ἀ. τινά malign him in turn, S. Ant.1053.