The antonyms for the word "most infatuating" can be quite subjective, as what might not be infatuating to one person may be to another. However, some potential antonyms could include underwhelming, unimpressive, disinteresting, unenchanting, or unappealing. These words all suggest that something is not captivating, alluring, or attractive. They differ in intensity, with "underwhelming" suggesting mild disappointment, and "unappealing" connoting stronger feelings of aversion or revulsion. It's important to note that these antonyms do not necessarily reflect an objective judgment of the thing in question, but rather the speaker's personal reaction to it.