"headstrong, insolent, resisting legitimate authority," c. 1600, from Latin contumaci-, stem of contumax "haughty, insolent, obstinate" (see contumely) + -ous. Related: Contumaciously; contumaciousness.
controverse
controversial
controversy
controvert
contubernal
contumacious
contumacy
contumelious
contumely
contusion
contusive