The opposite of "first" is "last," so it may seem difficult to find antonyms for the term "first lasts." However, there are several antonyms that can be used to express opposite meanings. For example, the opposite of "first" could include terms such as "ultimate," "final," "concluding," or "terminal." Alternatively, antonyms for "lasts" might include words like "begins," "commences," "starts," or "initiates." Together, these antonyms can create a sense of contrast, emphasizing the difference between the beginning and end of a particular experience, event, or process.