Mendacious
(adjective)
Given to or characterized by deception or falsehood; habitually lying; intentionally untruthful.
Origin:
From latin mendacius, from mendacium, meaning lie.
Examples:
- The mendacious salesman promised me a full refund, but I never received a penny back.
- The jury found the defendant guilty due to the mendacious testimony of several eyewitnesses.
- The politician's mendacious speech was filled with false statistics and made-up stories.
- The mendacious student was expelled from school for submitting a plagiarized paper.
- The witness was found to be mendacious, and his testimony was disregarded by the judge.