100 WordsTM Every Word Lover Should Know
by the Editors of the American Heritage® Dictionaries
sang-froid or sang·froid (säN-frwä' )
Coolness and composure, especially in trying circumstances: "For a moment his face became a white mask of horror, but he soon recovered his sang-froid and, looking up at Lady Windermere, said with a forced smile, 'It is the hand of a charming young man'" (Oscar Wilde, Lord Arthur Savile's Crime).
[French : sang, blood (from Old French, from Latin sanguis) + froid, cold (from Old French, from Vulgar Latin *frigidus, alteration of Latin frgidus).]