veracity

Etymology

From Middle French véracité, from Old French veracitie, from Medieval Latin vērācitās (“truthfulness”), from Latin vērāx (“truthful, speaking truth”), from vērus (“true, real”). See very.

noun

1. (uncountable, of a person) The quality of speaking or stating the truth; truthfulness.
   Of course if you don't accept Conway's story, it means that you doubt either his veracity or his sanity—one may as well be frank. 1933, James Hilton, Lost Horizon
2. (countable) Something that is true; a truthful statement; a truth.
3. (uncountable) Agreement with the facts; accordance with the truth; accuracy or precision.
4. Act of being exact and accurate.
5. Correctness and carefulness in one's plan of action.