American English
/ˈθæŋ.kləs/
2 syllables · Stress the first syllable.
Not receiving thanks or praise, even after hard or useful work.
In “thankless,” keep the first syllable strong and make the last syllable weak and quick: /ˈθæŋ.kləs/. Do not stress the last syllable.
Not receiving thanks or praise, even after hard or useful work.
Cleaning up after the event was a thankless job.
It usually describes work, but it can also describe a person who does not show gratitude.
thankless task · thankless job
Not showing or feeling thanks for what someone has done.
The thankless child never thanked her parents.