Word Origin & History
umpirec.1400, noumper, from O.Fr. nonper "odd number, not even," in reference to a third person to arbitrate between two, from non "not" + per "equal," from L. par. Initial -n- lost by c.1440 due to faulty separation of a noumpere, heard as an oumpere. Originally legal, the gaming sense first recorded 1714
EXPAND(in wrestling). Short form ump is attested from 1915. The verb is first recorded 1609, from the noun.
COLLAPSE