veridicus
Veridicus is a Latin adjective meaning truthful or veridical. In classical and medieval Latin it describes a person who tells the truth or a statement that is true. The term is used in religious, philosophical, and legal Latin to characterize credibility, reliability, or honesty.
Etymology and morphology: Veridicus is formed from verus “true” and the adjective suffix -dicus, yielding a sense
Usage: The adjective is used to describe people who speak the truth or statements that are credible.