Antonyms for the word "most memorialized" include "least remembered," "unremarkable," "anonymous," "oblivious," and "forgotten." These terms suggest a lack of significance or importance, implying that the object or event in question has not had a lasting impact on the observer or society as a whole. Alternatively, antonyms could comprise of words such as "overlooked," "ignored," "ordinary," "insignificant," or "neglected," indicating that the subject has not been given attention, praise, or recognition it deserves. Ultimately, when discussing the opposite of "most memorialized," we are referring to the dismissing or ignoring of something that has not left a lasting impact.