arbitre

/aʁ.bitʁ/
1.
nounmasculine

referee; umpire (person who enforces the rules during a sport or game)

arbitrator (person who decides or settles a dispute)

L'arbitre a sifflé un penalty juste avant la fin du match.

The referee blew for a penalty just before the end of the match.

2.
verbInd1stPresSing1, 3

to referee (a match)

to arbitrate, to mediate or decide between parties or options

C'est lui qui arbitre la finale ce soir.

He's the one refereeing the final tonight.