Adjective : imperturbable composure.    From Dictionary.com. 

Watkins stood by, with his usual imperturbability.    From Wordnik.com.  [McClure's Magazine, Vol. 6, No. 5, April, 1896] Reference

The latter, in spite of his imperturbability, grew pale.    From Wordnik.com.  [Five Weeks in a Balloon] Reference

His countenance had resumed its habitual imperturbability.    From Wordnik.com.  [Twenty-Thousand Leagues Under the Sea] Reference

Their courage is a mixture of imperturbability and tenacity.    From Wordnik.com.  [Tommy Atkins at War As Told in His Own Letters] Reference

Benton's habitual imperturbability had received a severe dent.    From Wordnik.com.  [Seawitch]

The pluterperfect imperturbability of the department of agriculture.    From Wordnik.com.  [Ulysses] Reference

He was determined to break down the other's wall of imperturbability.    From Wordnik.com.  [The Grell Mystery] Reference

Mr. Wilson's imperturbability on election night was like that of sturdy.    From Wordnik.com.  [Woodrow Wilson as I Know Him] Reference

We defy this barrage; we defy the campaign with absolute imperturbability.    From Wordnik.com.  [MAY DAY RALLY] Reference

Rising, he exposed a face stripped of its mask of Oriental imperturbability.    From Wordnik.com.  [Terry A Tale of the Hill People] Reference

Members sought pleasure by attaining a state of imperturbability (ataraxia).    From Wordnik.com.  [5. The Hellenistic World, to 30 B.C.E] Reference

His imperturbability always 'had the effect of a goad upon his father's temper.    From Wordnik.com.  [Australian Writers] Reference

So portentous is his gravity, so like a stone wall his imperturbability, that the.    From Wordnik.com.  [Punch, or the London Charivari, Volume 101, July 18, 1891] Reference

Their horses, displaying a fine equine imperturbability, trotted on down the hill.    From Wordnik.com.  [A Lady of Expectations]

I shrank back at the roar from behind us; even Raffles's imperturbability was shaken.    From Wordnik.com.  [Alfred Hitchcock's Mystery Magazine]

JACKSON's sense of humour not so keen, but his imperturbability even more impregnable.    From Wordnik.com.  [Punch, Or The London Charivari, Volume 102, March 26, 1892] Reference

Amongst endless stories of fears and flights, there is one of delightful imperturbability.    From Wordnik.com.  [Devon, Its Moorlands, Streams and Coasts] Reference

The imperturbability and easy replies of the woman harassed and tormented me in the extreme.    From Wordnik.com.  [Blackwood's Edinburgh Magazine — Volume 53, No. 327, January, 1843] Reference

The look of calm imperturbability vanished, and a deeply troubled expression took its place.    From Wordnik.com.  [Roger MacBride]

He sustained with equal imperturbability the assaults of the Tariff Reformers, who asserted that.    From Wordnik.com.  [Punch, or the London Charivari, Volume 159, August 4th, 1920] Reference

Exasperated by her fatalistic imperturbability, I felt moved by some furious and violent impulse.    From Wordnik.com.  [French and Oriental Love in a Harem] Reference

'That may be; but I represent the Queen,' replied Lord Houghton, with unruffled imperturbability.    From Wordnik.com.  [The Reminiscences of an Irish Land Agent] Reference

Dom, however, was relaxed, facing whatever the future might bring with practiced imperturbability.    From Wordnik.com.  [The Grand Wheel]

Love is the wish for others to be happy and is included in non-anger (Pali: adosa; imperturbability).    From Wordnik.com.  [The Four Immeasurable Attitudes in Hinayana, Mahayana, and Bon] Reference

In this state of imperturbability, they said, one would finally find the goal of all Hellenistic philosophy.    From Wordnik.com.  [Dictionary of the History of Ideas] Reference

We then give them the three roots of what is constructive, namely detachment, imperturbability, and lack of naivety.    From Wordnik.com.  [General Explanation of Seven-Point Attitude-Training ��� Part One: The First Four Points] Reference

Archie, sitting up for bones, than to sustain with imperturbability the curious if furtive observation of the carpenter.    From Wordnik.com.  [Bluebell A Novel] Reference

Dorsenne comforted her, and how reassured had she been by the Countess's imperturbability on the entrance of Boleslas Gorka!.    From Wordnik.com.  [The French Immortals Series — Complete] Reference

Minnie's serene imperturbability under her most potent thrusts, and was fain to exercise her wit on some more vulnerable object.    From Wordnik.com.  [Hollowmell or, A Schoolgirl's Mission] Reference

One day at one of these shooting-matches at Pall Mall I witnessed a demonstration of the imperturbability of these mountain men.    From Wordnik.com.  [Sergeant York And His People] Reference

In a few minutes Lan Yek stood before Terry, his Mongolian imperturbability shaken by this night summons from an officer of the law.    From Wordnik.com.  [Terry A Tale of the Hill People] Reference

Goodenough, the light cruiser commodore, praised Warrender as possessing “an imperturbability that no circumstances could ruffle.”.    From Wordnik.com.  [Castles of Steel]

My imperturbability appeared to convince him that I really did not understand German, because no further reference was made to the fact.    From Wordnik.com.  [Sixteen Months in Four German Prisons Wesel, Sennelager, Klingelputz, Ruhleben] Reference

I barked, with what I hoped was not too much stern forcefulness, with sufficient steel and empathy combined into a firm imperturbability.    From Wordnik.com.  [Hillary Campaign: She "Misspoke" About Bosnia Sniper Incident] Reference

Astonished out of their racial imperturbability, the Hillmen eyed each other at this departure from the ancient custom of ringing the Giant.    From Wordnik.com.  [Terry A Tale of the Hill People] Reference