Word Summary
bebaios: firm, secure
Original Word: βέβαιος
Transliteration: bebaios
Phonetic Spelling: (beb'-ah-yos)
Part of Speech: Adjective
Short Definition: firm, secure
Meaning: firm, secure
Strong's Concordance
firm, steadfast, sure.

From the base of basis (through the idea of basality); stable (literally or figuratively) -- firm, of force, stedfast, sure.

see GREEK basis

Thayer's Greek Lexicon
STRONGS NT 949: βέβαιος

βέβαιος, βεβαία (Winers Grammar, 69 (67); Buttmann, 25 (22)), βέβαιον (ΒΑΩ, βαίνω) (from Aeschylus down), stable, fast, firm; properly: ἄγκυρα, Hebrews 6:19; metaphorically, sure, trusty: ἐπαγγελία, Romans 4:16; κλῆσις καί ἐκλογή, 2 Peter 1:10; λόγος προφητικός, 2 Peter 1:19; unshaken, constant, Hebrews 3:14; ἐλπίς, 2 Corinthians 1:7 (6) (4 Macc. 17:4); παρρησία, Hebrews 3:6 (but WH Tr marginal reading in brackets); valid and therefore inviolable, λόγος, Hebrews 2:2; διαθήκη, Hebrews 9:17. (With the same meanings in Greek writings from Herodotus down.)