contumacious
adjective
[ ˌkɒntjʊˈmeɪʃəs ]
• (especially of a defendant's behaviour) stubbornly or wilfully disobedient to authority.
• "his refusal to make child support payments was contumacious"
Origin:
late 16th century: from Latin contumax, contumac- (perhaps from con- ‘with’ + tumere ‘to swell’) + -ious.
