Strong's #2634: katakurieuo (pronounced kat-ak-oo-ree-yoo'-o)
 from 2596 and 2961; to lord against, i.e. control, subjugate:--exercise dominion over (lordship), be lord over, overcome.
Thayer's Greek Lexicon:
 ́ 
 
  katakurieuō 
 
 1) to bring under one' s power, to subject one' s self, to subdue, master
 2) to hold in subjection, to be master of, exercise lordship over
 
  Part of Speech: verb
Relation: from G2596 and G2961
  Citing in TDNT: 3:1098, 486
 
Usage:
This word is used 4 times:
Matthew 20:25: "princes of the Gentiles  exercise dominion over them, and they that are great exercise authority"
Mark 10:42: "to rule over the Gentiles  exercise lordship over them; and their great ones"
Acts 19:16: "on them, and  overcame them, and prevailed against them,"
1 Peter 5:3: "Neither as  being lords over God's heritage, but being examples to the"