combatant
3.(ancient Rome) a professional combatant or a captive who entertained the public by engaging in mortal combat.
4.A person, usually a professional combatant, a captive, or a slave, trained to entertain the public by engaging in mortal combat with another person or a wild animal in the ancient Roman arena.
5.Jose Padilla was held for three and a half years as an enemy combatant once accused of being part of an al-Qaeda plot to detonate a dirty radioactive bomb.
