The word "unclean" refers to something that is dirty, unsanitary, or contaminated. The opposite of unclean is "clean," which means free of dirt, stains, or impurities. Other antonyms for unclean include "pure," "hygienic," "sanitized," and "sterile." These words convey a sense of cleanliness and orderliness, and are often used to describe spaces, surfaces, and objects that are meant to be free of dirt and grime. In contrast, unclean environments can be detrimental to health and wellbeing, and it is therefore important to maintain cleanliness in our homes, workplaces, and communities.