The term "un-satisfactory" refers to anything that is not satisfactory or disappointing. Its opposite, "satisfactory," describes something that is acceptable or pleasing. Other antonyms that could be used to describe something that is not satisfactory include "adequate," "acceptable," "sufficient," "reasonable," "commendable," "excellent," and "desirable." These words indicate that the object or situation in question meets or exceeds expectations in some way. In contrast, synonyms for "un-satisfactory" might include "unsatisfying," "inadequate," "deficient," "unacceptable," and "subpar." These terms suggest that the object or situation does not meet expectations or falls short in some way.