The word "captivatingness" refers to the quality of being captivating, which means to charm, fascinate or enchant. The antonyms for the word "captivatingness" would be boringness, unappealingness or uninterestingness. These antonyms describe the lack of charm, interest, and appeal that can make something or someone unattractive to others. A boring presentation, an unappealing movie, or an uninteresting book can fail to capture the attention of the audience and have the opposite effect of captivating. Therefore, it is essential to use engaging and captivating content to keep the audience's attention and interest, whether in business, education, or entertainment.