βεβαιόω, -ῶ

(βέβαιος), [in LXX: Ps 40 (41)12 (נצב hi.), 118 (119)28 (קוּם pi.), 3Ma.5:42 * ;]

to confirm, establish, secure, of things (cl.): λόγον, Mk 16:[20]; ἐπαγγελίας, Rom.15:8; of persons (DCG, ii, 605): 1Co.1:8, 2Co.1:21. Pass. 1Co.1:6, Col.2:7, Heb.2:3 13:9 (as an Attic legal term, to guarantee the validity of a purchase, establish or confirm a title; see next word, Cremer, 139; cf. δια-β.).†

(AS)

to confirm; establish; secure