The phrase "art acquainted" typically refers to someone who is knowledgeable or familiar with the world of art. Antonyms for this phrase might include "artless," "uninformed," or "ignorant." These words suggest a lack of understanding or appreciation for artistic works, whether due to a lack of exposure or a lack of interest. Someone who is artless may not have any interest in art or may not be able to appreciate its finer points, while someone who is uninformed may simply not have had the opportunity to learn about different artistic styles or movements. Someone who is ignorant of art may have some exposure, but lacks the knowledge necessary to fully appreciate it.