What is likely the opposite of the term "quash" in a legal context?

In a legal context, "quash" means to annul or set aside a legal proceeding or a judgment. Therefore, the opposite concept would involve maintaining or supporting a decision rather than rejecting or invalidating it. The term that reflects this meaning is "uphold," as it signifies the act of affirming or maintaining a judgment or decision, effectively reinforcing the legal standing of that decision.

While terms like "set aside" and "dismiss" also relate to ending a proceeding or invalidating a legal action, they do not convey the opposite action of "quash" as effectively as "uphold" does. "Negate" similarly implies cancellation or invalidation, which is contrary to the essence of affirming a decision. Thus, "uphold" accurately captures the concept of reinforcing or maintaining a legal ruling, making it the correct choice in this context.