alter ego, second self.
au revoir, goodby for the present.
amour-propre, conceit, egotism.
au fait, expert, informed.
bouleverser, to upset.
bizarre, odd, fanciful.
bête noire, a bugbear.
contretemps, a "hitch."
coup de grâce, finishing stroke.
couleur de rose, in a favorable light.