Peacekeeper (noun)

1. A person or group that works to maintain peace, especially in a conflict or war-torn area.
2. A person who helps to resolve conflicts between others.

Origin:

From the middle english word 'peackeeper' meaning 'one who keeps the peace'.

Examples:

1. The peacekeeper was sent to the war-torn country to help mediate a ceasefire.
2. The peacekeeper helped to negotiate a peace agreement between the rival factions.
3. The peacekeeper's mission was to protect civilians and promote stability in the region.
4. The peacekeeper's role was to act as a mediator and prevent further violence.
5. The peacekeeper was highly respected for their ability to resolve conflicts peacefully.