umpire

umpire n

ME < OFr non + per, peerless < L. par-em, equal.

1. Referee; intermediary; go-between; [fig.] judge; advocate; arbitrator; magistrate; negotiator; legal counsel; defense attorney; mediator in a disagreement; third party who decides between disputants in a controversy; [metaphor] liaison; ally at a royal court; contact person for social or political advancement.