Traitorous

a.	1.	Guilty of treason; treacherous; perfidious; faithless; as, a traitorous officer or subject.
	2.	Consisting in treason; partaking of treason; implying breach of allegiance; as, a traitorous scheme.

Adj.	1.	traitorous - deliberately and abominably disloyal or likely to betray trust or confidence; "the faithless Benedict Arnold"; "a lying traitorous insurrectionist" Synonyms: faithless, unfaithful
	2.	traitorous - constituting treason; "a traitorous act"; "treasonable acts like sabotage" Synonyms: treasonable, treasonous

Judas-like, Trojan-horse, alienated, betraying, breakaway, collaborative, deceitful, degenerate, disaffected, double-crossing, double-dealing, estranged, extreme, extremistic, factious, fifth-column, insurgent, insurrectionary, insurrectionist, mutineering, mutinous, quisling, quislingistic, rebel, rebellious, renegade, revolutional, revolutionary, riotous, seditionary, seditious, subversive, tergiversant, tergiversating, treacherous, treasonous, turbulent, turncoat, two-timing, unfaithful, unloyal, untrue