peacemaker

US /ˈpiːsˌmeɪ.kɚ/
UK /ˈpiːsˌmeɪ.kɚ/
"peacemaker" picture
1.

a person who brings about peace, especially by reconciling adversaries

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She acted as a peacemaker between the two arguing factions.
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He's always the peacemaker in our family disputes.
:
conciliatormediatorreconcilerarbiternegotiator