overruling of a referee's decision in sumo
A sumo-specific term. After a bout, the ringside judges may overrule the referee's initial decision on the outcome.
After a conference, the decision was overturned by an overruling.
Compound of 差し (prefix adding emphasis or direction) and 違え (noun form of 違える, 'to change' or 'to mistake'). The exact derivation is uncertain, but it refers to changing a decision.