1) Diplomat s skill 2) Social know-how 3) Tact 4) Urbanity; tact 1) French word used in English 
[barge] The Savoir Faire was built in Amsterdam in 1932. It originally was a cargo vessel carrying cargo in the Netherlands and Belgium. During World War II, it served as a troop carrier. It was converted to a hotel barge in 1976 and now serves as a luxury hotel barge, operated by European Waterways, cruising in France, the Netherlands, and... Savoir faire (pron) can also refer to: ...
[n] - social skill
savoir faire 1. The ability to know how to act or what to say in any situation; social adeptness. 2. The ability to act appropriately and adroitly in any situation; from early 19th century French, 'know how to do'.
address noun social skill
(French) knowing what to do, how to behave