Etymology
Advertisement

thankless (adj.)

"likely to not be rewarded with thanks," 1540s, from thank + -less. Related: Thanklessly; thanklessness.

updated on January 23, 2014

Advertisement
Advertisement
Definitions of thankless from WordNet

thankless (adj.)
not likely to be rewarded;
grading papers is a thankless task
Synonyms: unappreciated / ungratifying
thankless (adj.)
not feeling or showing gratitude; "How sharper than a serpent's tooth it is / To have a thankless child!"- Shakespeare;
Synonyms: ungrateful / unthankful
From wordnet.princeton.edu, not affiliated with etymonline.