The word "uncleanlier" describes something that is not very clean. Therefore, some antonyms for this word could be "cleaner," "neater," "tidier," "spotless," "immaculate," or "sanitary." These words describe an environment or object that is free from dirt, dust, or any other type of mess or filth. When something is clean, it gives off a sense of freshness, balance, and calmness, which contributes to the well-being of the individual using or living in that environment. Therefore, it is essential to maintain an atmosphere of cleanliness and orderliness, especially in areas that require sanitation, such as hospitals or nursing homes.