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English to English adjective
| 1 |
not feeling or showing gratitude |  | Example: ungrateful heirs
How sharper than a serpent's tooth it is / To have a thankless child!
source: wordnet30
| 2 |
Not grateful; not thankful for favors; making no returns, or making ill return for kindness, attention, etc.; ingrateful. | | source: webster1913 adjective satellite
| 3 |
disagreeable | | Example: I will not perform the ungrateful task of comparing cases of failure
source: wordnet30
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