Only then did she remember how she must behave at a ball, and tried to assume the majestic air she considered indispensable for a girl on such an occasion.
Serpukhov is already occupied by an enemy detachment and Tula with its famous arsenal so indispensable to the army, is in danger.
Tikhon Shcherbaty was one of the most indispensable men in their band.
It was impossible to take bread and clothes from our hungry and indispensable soldiers to give to the French who, though not harmful, or hated, or guilty, were simply unnecessary.
In quiet and untroubled times it seems to every administrator that it is only by his efforts that the whole population under his rule is kept going, and in this consciousness of being indispensable every administrator finds the chief reward of his labor and efforts.
Their usefulness did not depend on making the patient swallow substances for the most part harmful (the harm was scarcely perceptible, as they were given in small doses), but they were useful, necessary, and indispensable because they satisfied a mental need of the invalid and of those who loved her—and that is why there are, and always will be, pseudo-healers, wise women, homeopaths, and allopaths.
There are no more uses of "indispensable" in the book.
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Then a big pot was brought out as we raced to retrieve our indispensable spoons and bowls.
Leon Leyson -- The Boy on the Wooden Box
In fourteen years in Bluffton he had sired two sons and managed to worm his way so completely into Bennington’s life and make himself so indispensable that he sometimes seemed like Bennington’s third leg.