say it: uhn-GRAYT-fuhl
ungrateful is an adjective meaning "not feeling or showing gratitude". It carries 2 recorded senses.
not feeling or showing gratitude
“ungrateful heirs”
“How sharper than a serpent's tooth it is / To have a thankless child!”
disagreeable
“I will not perform the ungrateful task of comparing cases of failure”
Definitions, synonyms and semantic relations for ungrateful come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.