Meaning : Not feeling or showing gratitude.
Example :
Ungrateful heirs.
How sharper than a serpent's tooth it is / To have a thankless child!.
Synonyms : ungrateful, unthankful
Meaning : Not likely to be rewarded.
Example :
Grading papers is a thankless task.
Synonyms : unappreciated, ungratifying
Thankless meaning in Telugu.