Strong's #757: archo (pronounced ar'-kho)

a primary verb; to be first (in political rank or power):--reign (rule) over.

Thayer's Greek Lexicon:

̓́

archō

1) to be chief, to lead, to rule

Part of Speech: verb

Relation: a primary word

Citing in TDNT: 1:478, 81

Usage:

This word is used 2 times:

 

Mark 10:42: "Ye know that they which are accounted to rule over the Gentiles exercise lordship over them;"
Romans 15:12: "of Jesse, and he that shall rise to reign over the Gentiles; in him shall the Gentiles"