All terms in this list:
coup de grace: A final blow or shot given to kill a wounded person or animal.
tête-à-tête: A face-to-face meeting, or private conversation between two people, usually in an intimate setting; a head-to-head.
raison d'etre: a reason for living.
tour de force: A feat demonstrating brilliance or mastery in a field.
trompe l'oeil: A genre of still life painting that exploits human vision to create the illusion that the subject of the painting is real.
vis-à-vis: In relation to; compared with;
fait accompli: An accomplished fact, something that has already occurred; a done deal.
par excellence: Being the best of its kind.
naive: Lacking experience, wisdom, or judgement.
faux pas: A blunder (especially used in social contexts).
joie de vivre: Enjoyment of living; happiness, ebullience, zest for life.
esprit de corps: A shared spirit of comradeship, enthusiasm, and devotion to a cause among the members of a group, for example of a military unit.
debutante: a young woman who makes her first formal appearance in society
deja vu: A feeling of having previously experienced something, especially when that is not the case.
coup d'état: The sudden overthrow of a government, differing from a revolution by being carried out by a small group of people who replace only the leading figures.
coup d'etat: Alternative spelling of coup d’état.
chef d'oeuvre: A masterpiece.
chaise longue: A reclining chair with a long seat, which can support the outstretched legs of a sitter normally with one armrest.
carte blanche: Unrestricted power to act at one's own discretion; unconditional authority
camouflage: A disguise or covering up.
bon voyage: Used to wish someone a good journey.
bon vivant: a person who enjoys the good things in life, especially good food and drink
blasé: Unimpressed with something because of over-familiarity.
aide-de-camp: A military officer who serves as an adjutant to a higher ranking officer, prince or other high political dignitary.