Art proper for refers to the type of art that is appropriate or suitable for a particular purpose or occasion. Antonyms for this phrase can include art that is improper, unsuitable, or unfitting. Instead of art proper for, one can use alternative phrases such as art unsuitable for, art improper for, or art not suitable for. These antonyms convey a sense of discomfort or disapproval towards the artwork, indicating that it does not meet the expected standards or expectations. It is important to choose the right type of art for a specific event or occasion to ensure that it adds value and enhances the overall ambiance.