The antonyms for the word "art at service" would be terms that describe the opposite of art being used for utilitarian purposes. Some possible antonyms could include "art for art's sake," "pure art," or "fine art." These terms suggest that art is being created solely for its aesthetic or expressive value, without any particular function or goal beyond the creation of something beautiful or meaningful. By contrast, "art at service" implies that art is being used to achieve a specific purpose or outcome, such as promoting a brand, enhancing a space, or solving a problem. In this sense, the antonyms for "art at service" highlight different ways of thinking about the role and value of art in society.