IPA: /ˈpiːsˌmeɪ.kər/
KK: /ˈpisˌmeɪkər/
A person who helps to create peace or resolve conflicts between others.
The peacemaker worked tirelessly to bring the two sides together and end the fighting.
Peacemaker → It is formed from "peace" (from Old French *paix*, meaning tranquility or absence of conflict) and "maker" (from Old English *macian*, meaning to make or create). A peacemaker is someone who creates or promotes peace.
Think of someone who 'creates' ('maker') 'tranquility' ('peace') — that's why a peacemaker is someone who promotes peace.