What are the opposite words for superfine?

Superfine is an adjective that is used to describe something that is of excellent quality, a high grade or superior nature. Synonyms for superfine include superior, excellent, exquisite, premium, fine, and high-quality. On the opposite end of the spectrum, antonyms of superfine would be mediocre, low-quality, inferior, substandard, or simply just plain awful. These terms are used to describe items that are of lower quality or not up to par with the expected level. While the word superfine is usually used in reference to materials such as fabrics or foods, its antonyms are often used to describe various products or services.