unanswered
/ʌnˈænwərd/Definitions
1. adjective
not having been answered or responded to
“The letter to the editor remained unanswered for weeks.”
2. noun
a question or problem that has not been answered
“The unanswered questions at the end of the chapter left the reader puzzled.”
3. verb
to leave a question or problem without a response
“The professor’s silence seemed to leave the students unanswered.”