Contumacious /(kŏn`tū̇*mā"shŭs)/

Con·tu·ma·cious

Contumacious

a.
  1. Exhibiting contumacy; contemning authority; obstinate; perverse; stubborn; disobedient.
    There is another very, efficacious method for subduing the most obstinate, contumacious sinner.
  2. Willfully disobedient to the summons or orders of a court. (Law)