The word "pre siding" does not have any direct antonyms. However, we can consider its opposite or contrasting actions like opposing, contradicting, counterbalancing or contesting different perspectives. One can also think of alternatives or variations like abstaining, refraining, shirking, neglecting or ignoring. The context also determines the opposite of "pre siding" which could include standing up for something else, abstaining from a decision or remaining neutral. Hence, while a precise antonym for "pre siding" may not be available, we can consider several related or opposite actions that reflect a different viewpoint or a lack of commitment.