Traitorous, a.
Etymology: [Cf. F. traîtreux.]
1. Guilty of treason; treacherous; perfidious; faithless; as, a traitorous officer or subject. Shak.
2. Consisting in treason; partaking of treason; implying breach of allegiance; as, a traitorous scheme. -- Trai"tor*ous*ly, adv. -- Trai"tor*ous*ness, n.
Shades of meaning
Fernald lists traitorous only as an antonym, under honest.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given