The word "un-true" refers to something that is not true or false. Antonyms for this word include words that convey the opposite meaning. Some examples of antonyms for un-true are honest, true, accurate, genuine, and authentic. These words imply that something is sincere, trustworthy, and reflects reality. Other antonyms can be constructed using prefixes, such as pre-true, sub-true, and post-true, which suggest variations on the meaning of true. Overall, antonyms for un-true emphasize the importance of truthfulness, veracity, and reliability in our daily lives, and remind us that honesty is the foundation of all good communication.