traitorous

adj

1. Characteristic of a traitor; disloyal.

   “I tel you true my hart is ſwolne with wrath, On this ſame theeuish villain Tamburlain. And of that false Coſroe, my traiterous brother, Would it not grieue a King to be so abuſ’d?”

   “I that inceſtuous, that adulterate beaſt, / With witchcraft of his wits, with trayterous gifts, / O wicked wit, and giftes that haue the power / So to ſeduce; wonne to his ſhamefull luſt / The will of my moſt ſeeming vertuous Queene; [...]”

2. Constituting treason; treasonable or seditious.