The phrase "is up front" typically means that something or someone is honest, direct, or transparent. The antonyms for "is up front" include words that convey the opposite meaning, such as dishonest, evasive, or secretive. A person who is not "up front" may be described as untruthful, deceitful, or deceptive. Similarly, if information is not "up front," it may be hidden, obscured, or withheld. These opposite meanings suggest that being "up front" is an admirable trait, one that promotes trust, integrity, and reliability. Conversely, the antonyms for "is up front" indicate a lack of these qualities and may lead to suspicion, distrust, and skepticism.