A.one who gives assurance of a thing, authority, “ἀμφισβητουμένων” Plb.4.40.3 (pl.); “ἱστορίας” D.H.1.28, cf. 3.67, al.; confirmatory, “λόγοι” Phld.Sign.29.
2. legal surety, “τοῦ μόνιμον τὴν ὁμόνοιαν γενέσθαι” Plb.2.40.2; “β. τῆς πίστεως παρέχεσθαι” Plu. Flam.4; warrantor in sales, SIG2832 (Amphipolis), etc.