What is the antonym of "abate"?

The antonym of "abate" is "increase." To "abate" means to diminish or lessen in intensity or amount. Therefore, its opposite would be a term that conveys the idea of making something greater or amplifying it, which is captured by "increase."

While "diminish," "aggregate," and "reduce" also relate to changes in quantity or intensity, they do not serve as direct opposites to "abate." "Diminish" signifies a decrease, which aligns more closely with "abate," and "reduce" also implies making something smaller or less in quantity. "Aggregate" refers to the collection of items into a whole, but it doesn't specifically convey the contrast to the concept of reduction. Thus, "increase" remains the clear opposite of "abate."