Terrorist

noun
  1. A person who uses unlawful violence and intimidation, especially against civilians, in the pursuit of political aims. noun
    The government increased security measures to prevent any terrorist attacks.
    The group was labeled as a terrorist organization by several countries.
  2. Relating to or characteristic of terrorism. adjective
    The terrorist threat level was raised to high following the recent events.
    They were accused of having terrorist sympathies due to their involvement with the group.