Mendacious, a.
Etymology: [L. mendax, -acis, lying, cf. mentiri to lie.]
1. Given to deception or falsehood; lying; as, a mendacious person.
2. False; counterfeit; containing falsehood; as, a mendacious statement. -- Men*da"cious*ly, adv. -- Men*da"cious*ness, n.
Shades of meaning
Fernald lists mendacious only as an antonym, under honest.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given