And Then There Were None vocabulary

They had praised her courage and her sang-froid...

Agatha Christie. And Then There Were None. p.130 (1939)

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I was too frightened, even, for my stomach to turn. So all that Italian crew looked on and marvelled at the infant phenomenon that downed wine with the sang-froid of an automaton. It is not in the spirit of braggadocio that I dare to assert they had never seen anything like it.

Jack London. John Barleycorn

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this sangfroid was simply what it took to have accomplished what he had

Ruth Ware. The Woman in Cabin 10, p.195 (2016)

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and three years had given him an enviable reputation for sang-froid and determined bravery.

A.A. Hayes. The Denver Express