I am not lying," cried Dounia, losing her composure.
"No matter, sir, no matter!" he went on hurriedly and with apparent composure when both the boys at the counter guffawed and even the innkeeper smiled—"No matter, I am not confounded by the wagging of their heads; for everyone knows everything about it already, and all that is secret is made open.
Lead the way," she said with apparent composure, but her face was very pale.
There are no more uses of "composure" in the book.
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After I regained my composure, I thanked her for telling me about the problem.
During all this time he was evidently struggling for composure.