But I shall not scruple to assert, that the serenity of your sister’s countenance and air was such as might have given the most acute observer a conviction that, however amiable her temper, her heart was not likely to be easily touched.
But in all, and in almost every line of each, there was a want of that cheerfulness which had been used to characterise her style, and which, proceeding from the serenity of a mind at ease with itself and kindly disposed towards everyone, had been scarcely ever clouded.
Mrs. Bennet was restored to her usual querulous serenity; and, by the middle of June, Kitty was so much recovered as to be able to enter Meryton without tears; an event of such happy promise as to make Elizabeth hope that by the following Christmas she might be so tolerably reasonable as not to mention an officer above once a day, unless, by some cruel and malicious arrangement at the War Office, another regiment should be quartered in Meryton.
There are no more uses of "serene" in the book.
Show samples from other sources
While I lie awake worrying, she sleeps serenely.
She remained serene even when he was yelling at her.