There was no indispensable necessity for my communicating with Joe by letter, inasmuch as he sat beside me and we were alone.
I believe it is well known in a constitutional country that Mr. Wopsle could not possibly have returned the skull, after moralizing over it, without dusting his fingers on a white napkin taken from his breast; but even that innocent and indispensable action did not pass without the comment, "Wai-ter!"
There are no more uses of "indispensable" in the book.
Show samples from other sources
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.