The antonyms for the word "un-truthfulnesses" are words that convey honesty, sincerity, and truthfulness. Some examples of these words include honesty, veracity, truthfulness, integrity, and trustworthiness. These words represent the opposite of untruthfulness and suggest values that are highly regarded in personal and professional relationships. Another set of antonyms are misleading, dishonest, deceitful, and untruthful that reflect qualities that can undermine trust and credibility. Understanding antonyms for "un-truthfulnesses" can help one better articulate and appreciate the importance of being truthful and honest in interactions with others. Ultimately, the use of antonyms can provide greater clarity and depth of meaning to our language.