traitorously
    adv 1: in a disloyal and faithless manner; "he behaved
           treacherously"; "his wife played him false" [syn:
           faithlessly, traitorously, treacherously,
           treasonably, false]

Traitorous \Trai"tor*ous\, a. [Cf. F. tra[^i]treux.]
   1. Guilty of treason; treacherous; perfidious; faithless; as,
      a traitorous officer or subject. --Shak.
      [1913 Webster]

   2. Consisting in treason; partaking of treason; implying
      breach of allegiance; as, a traitorous scheme.
      [1913 Webster] -- Trai"tor*ous*ly, adv. --
      Trai"tor*ous*ness, n.
      [1913 Webster]

TRAITOROUSLY, pleadings. This is a technical word, which is essential in an 
indictment for treason in order to charge the crime, and which cannot be 
supplied by any other word, or any kind of circumlocution. Having been well 
laid in the statement of the treason itself, it is not necessary to state 
every overt act to have been traitorously committed. Vide Bac. Ab. 
Indictment, G 1; Com. Dig. Indictment, G. 6; Hawk. B. 2, c. 25, s. 55; 1 
East's P. C. 115; 2 Hale, 172, 184; 4 Bl. Com. 307; 8 Inst. 15; Cro. C. C. 
87; Carth. 319; 2 Salk. 683; 4 Harg. St. Tr. 701; 2 Ld. Raym. 870; Comb. 
259; 2 Chit. Cr. Law, 104, note (b).