The word unsatisfactory is a direct antonym of dissatisfactory. Synonyms of unsatisfactory include disappointing, displeasing, inadequate, unacceptable, and unsuitable. When something is unsatisfactory, it fails to meet expectations or requirements. The opposite of dissatisfactory is something that meets expectations, is pleasing, or satisfactory. The synonyms of satisfactory include adequate, sufficient, suitable, decent, and acceptable. So, while dissatisfactory means that something is not good enough, unsatisfactory refers to something that is not up to the required level. By understanding antonyms, we can communicate more effectively and use language in a more precise and nuanced way.