The term "aping up" is frequently used to describe the act of increasing, boosting, or heightening something. When it comes to finding antonyms for this phrase, we can use words that imply the opposite of this action. Some possible antonyms for "aping up" could be "dampening down" or "reducing," both of which imply a decrease or a lowering of something. Other antonyms may include "downgrading," "diminishing," "weakening," or "lessening," all of which suggest a decrease or a lowering of intensity, extent, or volume. These antonyms can be used to describe actions that are opposite to "aping up" and can provide a range of linguistic options for writers and speakers.