sang-froid or sang·froid (sä
N-frwä' )
noun
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 fr

gidus).]