DIPLOMAT
diplomat, diplomatist
(noun) an official engaged in international negotiations
diplomat
(noun) a person who deals tactfully with others
Source: WordNet® 3.1
Etymology
Noun
diplomat (plural diplomats)
A person, such as an ambassador, who is accredited to represent a government officially in its relations with other governments or international organisations
(figuratively) Someone who uses skill and tact in dealing with other people
Synonyms
• diplomatist
Source: Wiktionary
Dip"lo*mat, Dip"lo*mate, n. Etym: [F. diplomate.]
Definition: A diplomatist.
Source: Webster’s Unabridged Dictionary 1913 Edition