Fivestar is a word used to describe something that is of the highest quality or rating. However, there are several antonyms for the word fivestar that describe something of lower quality or rating. These include words such as mediocre, average, or unsatisfactory. These words are used to describe something that is not exceptional or outstanding, but rather just satisfactory or ordinary. Other antonyms for fivestar include subpar, inferior, or low quality. When searching for a product or service, it is important to look for reviews and ratings that reflect a fivestar experience, rather than settling for something that is just average or unsatisfying.