There are various antonyms for the word "slimier," which is used to describe something that is unpleasantly greasy or oozy. One antonym for slimier could be "cleaner," which means free from dirt, impurities, or stains. Another antonym could be "sanitary," describing something that is clean and hygienic. "Dryer" could also be an antonym to slimier, meaning there is no dampness or wetness. A "smooth" surface could also be an antonym to slimier, suggesting something is soft and velvety without any sticky texture. Finally, "odorless" could also be an antonym to slimier, which means there is no unpleasant scent or smell.