savoir-faire
The ability to act appropriately or handle or respond to any social situation; tact. The phrase is French for "to know how to do." You could learn a lot about how to deal with people by studying the savoir-faire with which she moves around any room.
savoir ˈfaire
(from French, approving) the ability to behave in the appropriate way in certain situations: He was renowned throughout the diplomatic world for his savoir faire.The meaning of the French phrase is ‘know how to do’.