The term "most fair-to-middling" refers to something that is moderate or average in quality. The antonyms for this term include exceptional, excellent, outstanding, remarkable, superior, and unparalleled. These words describe something that stands out because of its exceptional quality, excellent performance or unique characteristics. On the other hand, inadequate, inferior, poor, substandard, and unsatisfactory are antonyms that describe performance below average or that fall short of expectations. Choosing the right antonym will help you to communicate your intended meaning more clearly and accurately, enhancing the clarity of your message.