He embraces the Sisyphean nature of his life's work with an imperturbable calm.

There was something grotesque about him, sharpened by his grace and the imperturbable calm of his white face.

But Marianna Ucria is possessed of an imperturbable calm.

Hans with his usual imperturbable calm remained at the helm.

Hans was at the tiller steering with his usual imperturbable calm.

If they had nothing else, they had a good conscience and imperturbable calm and serenity.

Mary considered shooting him just to shake his imperturbable calm.

She had reached a state of imperturbable calm, and the additional confirmation of her lover's death meant nothing.

To manifest an imperturbable calm would be, for me, giving up some kind of basic hope.

"By the simplest means imaginable," retorted Lenoir with imperturbable calm.