The antonyms for the word "most disappeared" are "many visible", "abundant", or "plentiful". When something has not disappeared or has even increased in numbers, we can say that it is visible, abundant, or plentiful. For example, if we look at the population of endangered species, we can say that some of them have become visible or abundant due to conservation efforts. Moreover, in the context of a missing person, we can say that some people are found and are no longer disappeared. Thus, the antonyms of "most disappeared" are significant because they indicate something that has not vanished or has even become more prevalent.