noun / adjective
insurgent
in-SUR-junt/ˌɪnsˈɝdʒʌnt/
A person rebelling against established authority, or relating to such rebellion.
The insurgent raises a banner in defiance of the fortified authority building.

Etymology
An insurgent is literally someone rising up, with physical rising becoming an image of revolt against authority. The prefix may mean “against,” though it may instead simply intensify the rising.
In context
… returning the nation to a state of normalcy and order was more important than killing every insurgent in in the region to end the violence
More examples
- An insurgent group controlled the mountain road.
- The insurgent refused to surrender his weapon.
- Talks began between officials and insurgent leaders.
Forms
insurgent · insurgents
insurgency noun — organized rebellion against authority
Similar words
- rebel
- Rebel is broad; insurgent often concerns organized resistance to established authority.
- revolutionary
- A revolutionary seeks fundamental change; an insurgent need not propose a complete new system.