Strong's G1402 — δουλόω (verb)
douloo (dou-loh'-o) v.
1. to enslave
{literally or figuratively}
[from G1401]
KJV: bring into (be under) bondage, X given, become (make) servant 
Root(s): G1401 
Hebrew root: δοῦλος
Occurrences: 8