"Uncleanly" refers to something that is dirty or unhygienic. Antonyms for "uncleanly" include "clean," "sanitary," and "hygienic." These words describe a state or environment that is free from dirt, germs, and bacteria. Another antonym for "uncleanly" is "tidy," which implies a space that is well-organized and well-maintained. "Neat" and "orderly" are also antonyms for "uncleanly," suggesting a space that is well put together and arranged in a systematic manner. Overall, these antonyms describe a space that is in a clean and organized state, free from any dirt or germs that could pose a threat to one's health or well-being.