He bore with philosophy the conviction that Elizabeth must now become acquainted with whatever of his ingratitude and falsehood had before been unknown to her; and in spite of every thing, was not wholly without hope that Darcy might yet be prevailed on to make his fortune.
There are no more uses of "ingratitude" in the book.
Show samples from other sources
"Boy," Mrs. Amos said, "I am not the least bit surprised at your show of ingratitude.
Christopher Paul Curtis -- Bud, Not Buddy
I remember he used words like ’failure’ and ’ingratitude,’ and once he said very clearly, ’I know how well I have performed my duty.’