də̇ˈplōməd.ə̇st, -mətə̇st noun
( -s )
Etymology: from diplomatic (I) , after such pairs as English dramatic: dramatist
1. : diplomat
churchmen were the natural intermediaries in this business, and a good clerical diplomatist might reasonably expect a bishopric — F.M.Stenton
the greatest of the German professional diplomatists of the interwar period — H.J.Morgenthau
2. : one who is dexterous, tactful, or artful in meeting situations (as in managing men) without arousing antagonism