Middle English arbitrefrom Old French from Latin arbiterof Phoenician originʕrb in Semitic roots
American Heritage Dictionary of the English Language, 5th Edition
Old French arbitre, from Latinarbiter (“a witness, judge, literally one who goes to see”).
Arbiter Sentence Examples
He was the arbiter of townspeople, of feudal lords and of kings.
Both monarchs were eager for England's alliance, and their suit enabled Wolsey to appear for the moment as the arbiter of Europe.
He was accepted as arbiter and his decision brought an end to the strife.
He frequently assisted Philip in conducting negotiations with foreign powers, and he was an arbiter in tournaments and on all questions of chivalry, where his wide knowledge of heraldry was highly useful.
Gucci is well known as being an arbiter of style in the fashion world.