imperturbability

• Cecily accepted the news with her usual imperturbability, and told him not to worry about that . —  Chase, Loretta - Knave's Wager
• That could be because of his imperturbability, and the timbre of the translator's voice, but this was a man in control of himself, in much the same way that Trudeau was. —  The Phantom Observer
• While happy in not being conventional, and while rejoicing, or at least unconsciously enjoying freedom from the bonds of etiquette, he agrees with the Chinese, red Indians, May Fairies, and Fifth Avenoodles in manifesting under the most trying circumstances that imperturbability which was once declared by an eminent Philadelphian to be "the Corinthian ornament of a gentleman." —  The Gypsies
• His bold features wore the usual Indian expression of saturnine imperturbability, and he half sat, half reclined upon the log as motionless as a piece of carven bronze, staring at Landless with large, inscrutable eyes Landless, staring in return, saw something else. —  Prisoners of Hope A Tale of Colonial Virginia
• Need we say that Pedro's imperturbability was by no means the result of apathy Blow away till you bust your buzzum," said Quashy, apostrophising the gale as he sat down with a beaming display of teeth and spread out his hands before the blaze, after having advanced supper to a point which admitted of a pause; "I don' care a butt'n how hard you blow now Ah! —  The Rover of the Andes A Tale of Adventure on South America

Roget's II: The New Thesaurus

Used in the Same Context