Strong's G949 — βέβαιος (adjective)
bebaios (beb'-ai-os) adj.
1. firm, steadfast, stable
{literally or figuratively}
[from the base of G939 (through the idea of having many feet)]
KJV: firm, of force, stedfast, sure 
Root(s): G939 
Hebrew root: βάσις
Occurrences: 8