thankless

/ˈθæŋkləs/
adjective
  1. Not likely to be appreciated or rewarded; unappreciated.
    • Being a referee can be a thankless role, with everyone complaining about your calls.
    • Cleaning the public restrooms is often a thankless job.
    • She took on the thankless task of organizing the office party.
  2. Not feeling or showing gratitude; ungrateful.
    • She gave a thankless shrug and walked away.
    • After all I did for him, he was completely thankless.
    • A thankless child breaks a parent's heart.
What does "thankless" mean? | whatsthatwordmean | whatsthatwordmean