Synonyms:
ungrateful, thankless, unthankful
Meaning: not feeling or showing gratitude; "ungrateful heirs"; "How sharper than a serpent's tooth it is / To have a thankless child!"- Shakespeare
Usage examples
Perhaps you think me ungrateful
"Ungrateful wretch!" said the Beast.
"It is very ungrateful of you to say such a thing."
"I hope you don't think me ungrateful," said Bernard.
"Ungrateful creatures!" said a voice from the Plane Tree.
She was not ungrateful, certainly, but she was overwhelmed.
This was specially ungrateful, because Bell had recommended the book.
In fact, I believe that the best definition of man is the ungrateful biped.
He understood exactly how she had felt, and he was not an ungrateful brother.
"Avenant you have saved my life, I will not be ungrateful, I will repay you."