thankless

adjective
UK /ˈθæŋk.ləs/
US /ˈθæŋk.ləs/

Something thankless is hard work that nobody says thank you for.

Cleaning up after the party was a thankless job.


OTHER MEANINGS

2. Not showing or feeling gratitude; ungrateful.

He gave a thankless shrug when she handed him the gift.

3. Not likely to be appreciated or rewarded.

She took on the thankless task of organizing the files.

4. Of a person, failing to acknowledge kindness received.

It is thankless to ignore the help of your friends.