The word "art usual" is often used to describe something that is typical or expected. However, sometimes you may want to express the opposite idea. In these cases, you can use antonyms to convey a different meaning. Some antonyms for "art usual" include uncommon, atypical, exceptional, irregular, and uncommonplace. These words can be used to describe something that stands out or is out of the ordinary. For example, instead of saying "the artwork was art usual," you could say "the artwork was exceptional and unique." Using antonyms can add variety and depth to your language, and help you express more nuanced ideas.