IPA: /ˈdɪpləmæt/
KK: /ˈdɪpləˌmæt/
A person who represents their country in discussions and negotiations with other countries, often using skill and tact to manage relationships.
The diplomat successfully negotiated a peace treaty between the two nations.
Diplomat → It is formed from "diploma" (from Greek "diplōma", meaning folded paper or document) and the suffix "-t" (indicating a person). A diplomat is a person who carries official documents and represents their country in foreign affairs.
Think of a diplomat as someone who carries important 'documents' ('diploma') to represent their country in discussions with others.