1. the quality or state of being dishonest or untruthful
Usage: formal

Examples

• The politician’s mendaciousness was exposed when his lies were revealed.
• Her mendaciousness made it impossible for anyone to trust her.
• The witness’s mendaciousness undermined the entire case.
• His reputation for mendaciousness preceded him wherever he went.
• The journalist investigated the company’s mendaciousness in their financial reports.
• The mendaciousness of the advertisement was obvious to most consumers.