The tune, played with precision and in exact time, began to thrill in the hearts of Nicholas and Natasha, arousing in them the same kind of sober mirth as radiated from Anisya Fedorovna’s whole being.
There was nothing wrong or unseemly in what they said, it was witty and might have been funny, but it lacked just that something which is the salt of mirth, and they were not even aware that such a thing existed.
Meanwhile the younger generation: Boris, the officer, Anna Mikhaylovna’s son; Nicholas, the undergraduate, the count’s eldest son; Sonya, the count’s fifteen-year-old niece, and little Petya, his youngest boy, had all settled down in the drawing room and were obviously trying to restrain within the bounds of decorum the excitement and mirth that shone in all their faces.
Dolokhov looked at Pierre with clear, mirthful, cruel eyes, and that smile of his which seemed to say, "Ah!
They laughed and were gay not because there was any reason to laugh, but because gaiety and mirth were in their hearts and so everything that happened was a cause for gaiety and laughter to them.
There are no more uses of "mirth" in the book.
Show samples from other sources
It was an evening of many stories and great mirth.
He felt no mirth or humor and wondered if there’d ever be a time again when he would.