βεβαί-ωσις · bebai-ōsis — LSJ
confirmation, β. γνώμης Th. 1.140, cf. 4.87, Demetr.Lac. Herc. 1012.38F., Ph. 1.486, al., D.H. Rh. 10.18, Hermog. Prog. 5; εἰς β. in perpetuity, ἡ γῆ οὐ πραθήσεται εἰς β. LXX Le. 25.23.
legal warranty, Aeschin. 3.249 (pl.), PTeb. 311.27 (ii A. D.), etc.; βεβαιώσεως δίκη Poll. 8.34.