The term "art constituent" refers to an element or factor that contributes to the creation of art or is a component of an artwork. Some antonyms or opposites of this term include non-artistic, noncreative, unoriginal, uninspiring, and mundane. These words suggest a lack of imagination, innovation, and expression that are crucial to the making of art. Another antonym could be destructive, which implies art's ability to create and constructive, which suggests the opposite. Overall, antonyms for "art constituent" denote the absence of the characteristics that make art what it is- a unique, influential, and emotionally powerful form of expression.