Mendacious

прилагательное лживый; ложный, обманчивый Синоним(ы): false, erroneous, lying, untruthful

Большой англо-русский словарь

Mendacious

adjective Etymology: Latin mendac-, mendax — more at amend given to or characterized by deception or falsehood or divergence from absolute truth Example: mendacious tales of his adventures Synonyms: see dishonestmendaciously adverbmendaciousness noun

Merriam-Webster's Collegiate Dictionary