The word "sordidnesses" refers to immoral, dishonest, or unclean behavior. Its antonyms would be "cleanliness," "honesty," and "morality." These words are associated with cleanliness, virtue, and ethical behavior. They are used to describe actions which are pure, honorable, and unblemished. For instance, the antonym of sordidness could be a clean living lifestyle, with no immoral values. Similarly, honesty is the antonym of sordidness, as it is truthful and upright in nature. Furthermore, morality is an antonym of sordidness as it represents the obligation to act according to certain ethical principles. Therefore, by using antonyms, people can express themselves effectively and accurately.