Antonyms are words that have opposite meanings to each other. The antonyms for the word "most arousing" would be words that describe things that are not stimulating or exciting. Some possible options for antonyms for "most arousing" might include words like boring, uninteresting, dull, tedious, tiresome, or humdrum. These words all describe situations, activities, or experiences that lack the excitement, energy, or novelty of something that is "most arousing." Whether we're talking about a book, a movie, a piece of music, or even a person, the antonyms for "most arousing" suggest things that are likely to leave us feeling bored or disengaged.