Sure - Vine's Expository Dictionary of New Testament Words
Sure
[ A-1,Adjective,G804, asphales ]safe," is translated "sure" in Hebrews 6:19. See CERTAIN, B.
[ A-2,Adjective,G949, bebaios ]
"firm, steadfast," is used of
(a) God's promise to Abraham, Romans 4:16;
(b) the believer's hope, Hebrews 6:19, "steadfast;"
(c) the hope of spiritual leaders regarding the welfare of converts, 2 Corinthians 1:7, "steadfast;"
(d) the glorying of the hope, Hebrews 3:6, "firm;"
(e) the beginning of our confidence, Hebrews 3:14, RV, "firm" (AV, "steadfast");
(f) the Law given at Sinai, Hebrews 2:2, "steadfast;"
(g) the testament (or covenant) fulfilled after a death, Hebrews 9:17, "of force;"
(h) the calling and election of believers, 2 Peter 1:10, to be made "sure" by the fulfillment of the injunctions in 2 Peter 1:5-7;
(i) the word of prophecy, "made more sure," 2 Peter 1:19, RV, AV, "a more sure (word of prophecy);" what is meant is not a comparison between the prophecies of the OT and NT, but that the former have been confirmed in the person of Christ (2 Peter 1:16-18). See FIRM.
[ A-3,Adjective,G4103, pistos ]
"faithful," is translated "sure" in Acts 13:34. See FAITHFUL.
Note: In 2 Timothy 2:19, AV, stereos, "firm," is translated "sure," and connected with "standeth," RV, "the firm (foundation of God standeth)," i.e., "however much the faith may be misrepresented or denied, the firm foundation of God's knowledge and truth, with its separating power, remains."
[ B-1,Verb,G805, asphalizo ]
"to make safe or sure" (akin to A, No. 1), is rendered "to make sure" in Matthew 27:64-Matthew 27:66, of the sepulchre of Christ; elsewhere, Acts 16:24, of making feet fast in the stocks. See FAST.
Note: In the AV of John 16:30; Romans 2:2; Romans 15:29, the verb oida, "to know," is translated "to be sure" (RV, in each place, "to know"). So with ginosko, "to know," in John 6:69. For the difference between the verbs See KNOW.