"Art acquainted with" refers to one's knowledge and familiarity with a particular subject or skill. As for its antonyms, these could be "unacquainted," which suggests a lack of knowledge or experience with something, or "ignorant," which implies a deliberate or unintentional lack of understanding about a topic. Another possible antonym would be "novice," meaning someone who is inexperienced or still learning about a particular subject. On the opposite end of the spectrum, we could use "expert" or "masterful" to describe someone who possesses a deep understanding and skill in their field. Overall, antonyms for "art acquainted with" would vary depending on the context and extent of one's knowledge on a given topic.