With her imperturbable calm she did not begin to speak in front of the valet.
It is not too much to say that his imperturbable equanimity, his serene bonhomie kept the host together.
During this time he went from one city to the other, according as the danger was more pressing, and constantly displayed an admirable zeal and an imperturbable energy.
The resplendent medieval colouring of the subject, the essentially heroic character of Joan of Arc, gave Schiller an admirable opportunity for the display of his rich imagination and rhetorical gifts; and by an ingenious alteration of the historical tradition, he was able to make the drama a vehicle for his own imperturbable moral optimism.
Annoyed by Whitworth's imperturbable demeanour, he ended with these words: "You must respect treaties, then: woe to those who do not respect treaties.