He seemed very thankless after all we did for him.
It's a thankless attitude to have, considering all the support you've received.
Frequently Asked Questions
The phonetic transcription of "thankless" is /ˈθæŋkləs/ in British English and /ˈθæŋkləs/ in American English. Click the 🔊 button to hear both pronunciations.
Synonyms for "thankless": unappreciated, ungrateful, unrecognized, unrewarding.
Example usage of "thankless": "Cleaning up after the party is a thankless task.". More examples on the page.