Leonardo’s exercises in anatomy proved indispensable.
Nobody is infallible,’ Colonel Cathcart said sharply, and then continued vaguely, with an afterthought: ’Nobody is indispensable, either.
Lieutenant Colonel Korn was a loyal, indispensable ally who got on Colonel Cathcart’s nerves.
You’re just like I am — indispensable!’
If someone did have to become indispensable to him, Colonel Cathcart lamented, it could just as easily have been someone wealthy and well groomed, someone from a better family who was more mature than Colonel Korn and who did not treat Colonel Cathcart’s desire to become a general as frivolously as Colonel Cathcart secretly suspected Colonel Korn secretly did.
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.