Lexical Definition

‎βέβαιος‎ bébaios (beb'-ah-yos) firm ^G:A
from the base of ‎βάσις‎ (through the idea of basality)

firm, of force, stedfast, sure.

• stable (literally or figuratively)

Abbott-Smith

** βέβαιος, -ον (also -α, -ον; < βαίνω), [in LXX: Es 3:13, Wi 7:23, III Mac 5:31 7:7, IV Mac 17:4*;]
firm, secure: ἄγκυρα, He 6:19; metaph., sure (esp. "in the sense of legally guaranteed security," Deiss., BS, 109; cf . two foll. words): ἐπαγγελία, Ro 4:16; ἐλπίς, II Co 1:6; λόγος, He 2:2; παρρησία, He 3:6; ἀρχή (τ. ὑποστάσεως), He 3:14; διαθήκη, He 9:17; κλῆσις κ. ἐκλογή, II Pe 1:10; comp. (-ότερος), προφητικὸς λόγος, II Pe 1:19.†

Abbott-Smith References

Liddell-Scott-Jones

βέβαιος, ον

(so always in [Refs 5th c.BC+], also α, ον (see. below): (βαίνω):— firm, steady, κρύσταλλος [Refs 5th c.BC+]; γῆ β. terra firma, [Refs 2nd c.AD+]; steadfast, durable, ὁμιλία.. πιστὴ καὶ βέβαιος [βέβαιος ἦν ἡ σωτηρία 5th-6th c.BC: Andocides Orator 1.53; εἰρήνην βεβαίαν ἀγαγεῖν 5th-6th c.BC: Isocrates Orator 4.173; φιλία βέβαιος 5th-6th c.BC: Plato Philosophus “Symposium” 182c; βεβαίου τε καὶ καθαρᾶς ἡδονῆς γεύεσθαι [prev. author] “R.” 586a; δόξαι καὶ πίστεις βέβαιοι καὶ ἀληθεῖς [prev. author] “Ti.” 37b, etc. ">Refs 5th c.BC+]

__b sure, certain, τέκμαρ [Refs 5th c.BC+]; πύλας β. παρέχειν make safe, secure, [Refs 5th c.BC+]; βεβαιότερος κίνδυνος a surer game, [Refs]: superlative -ότατος[Refs]; βέβαιόν ἐστί τινι ὅτι.. [Refs 1st c.BC+] confirm, guarantee, [Refs 1st c.BC+]
__2 of persons, etc., steadfast, constant, φίλος [Refs 5th c.BC+]infinitive, βεβαιότεροι μηδὲν νεωτεριεῖν more certain to make no change, [Refs 5th c.BC+]
__3 τό β. certainty, [Refs 5th c.BC+]; but τὸ β. τῆς διανοίας firmness, resolution, [Refs 5th c.BC+]
__3.b security, guarantee, τὸ δημόσιον β. [Refs]
__II adverb -ως[Refs 5th c.BC+]; ἔχειν, γνῶναι, δημοκρατεῖσθαι, [Refs 4th c.BC+]: comparative -ότερον, οἰκεῖν [Refs 5th c.BC+]; -οτέρως [Refs 5th c.BC+]: superlative -ότατα[Refs 5th c.BC+]