savoir-faire
From Longman Dictionary of Contemporary Englishsavoir-fairesav‧oir-faire /ˌsævwɑː ˈfeə $ -wɑːr ˈfer/ noun [uncountable] formal the ability to do and say the right things in social situationsExamples from the Corpussavoir-faire• people with money and savoir-faire• What vanity, to imagine that Tommaso was continuing his exhibition of savoir-faire acquired in Naples for his benefit.Origin savoir-faire (1800-1900) French “knowing how to do”