Antonyms for the word "most magnetizing" would be the opposites of what makes something attractive and captivating. These could include unappealing, repulsive, uninteresting, dull, boring, mundane, ordinary, unremarkable, or common. These are the things that typically lack the qualities of magnetism and are unable to draw people or things towards them. While being the opposite of what makes something magnetic, these words still serve an important purpose in the English language, helping us to describe things that do not possess the qualities of being captivating or attractive.