Learn English – Is there one word for “not challenged enough”


I was typing an essay and wrote unchallenged to mean that the subject didn't feel challenged, but then I realized that unchallenged means "undisputed" and the definition that I thought isn't really attributed to the word. So, my question is, is there one adjective that means "not challenged enough?"
Thank you 🙂

Best Answer

The term I have heard and used myself is: Underemployed.