βέλτ-ιστος · belt-istos — LSJ
best, most excellent, β. ἀνὴρ γενενῆσθαι περὶ τὸν δῆμον Ar. Eq. 765; ὦ βέλτιστε or β., a common mode of address, my dear friend, Id. Pl. 1172, Antiph. 289, Pl. R. 337e, etc.; ὦ βέλτιστε σύ Eub. 106; ὦ β. ἀνδρῶν Pl. Grg. 515a; ὦ ἄριστε καὶ β. Id. Lg. 902a; βέντισθʼ οὗτος Theoc. 5.76; ὑπὲρ τὸ β. A. Ag. 378; οἱ β. or τὸ β. the aristocracy, X. HG 5.2.6, Cyr. 8.1.16, Ath. 1.5, etc.; τὸ β., in Philos., the highest good, Pl. Phd. 99a, 99b, Epict. Ench. 51, etc.; τὰ β. βουλεύειν Th. 4.68; οὐκ ἀπὸ τοῦ β.