The phrase "made apparent" means to reveal, expose, or make something obvious or clear. Some antonyms for this expression include "concealed," "hidden," "masked," "obscured," and "veiled." These words indicate that something is being kept from view or deliberately hidden. Another antonym could be "ambiguous" or "vague," which means that something is unclear or uncertain. "Unseen," "unnoticed," and "unrecognizable" are also antonyms because they suggest that something is not visible or apparent to the observer. In summary, there are many antonyms for the phrase "made apparent," each of which denotes something that is hidden, unclear, or not visible.