adjective

failing to be loyal to a person, country, or organization to which one has obligations.

she was accused of being disloyal to the government

unfaithful,faithless,false,false-hearted,untrue,inconstant,untrustworthy,treacherous,perfidious,traitorous,subversive,seditious,unpatriotic,two-faced,Janus-faced,double-dealing,double-crossing,deceitful,dissident,renegade,adulterous,back-stabbing,two-timing,recreant,hollow-hearted,double-faced,Punic