My sufferings were augmented also by the oppressive sense of the injustice and ingratitude of their infliction.
He could have endured poverty, and while this distress had been the meed of his virtue, he gloried in it; but the ingratitude of the Turk and the loss of his beloved Safie were misfortunes more bitter and irreparable.
A murmur of approbation followed Elizabeth’s simple and powerful appeal, but it was excited by her generous interference, and not in favour of poor Justine, on whom the public indignation was turned with renewed violence, charging her with the blackest ingratitude.
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.’