unfinishedproblem
nounUK /ʌnˈfɪnɪʃt ˈprɒbləm/
US /ʌnˈfɪnɪʃt ˈprɑːbləm/
A problem that is not solved yet.
The broken bike is an unfinished problem we still need to fix.
OTHER MEANINGS
2. A task that has been started but not completed.
Her science project is an unfinished problem sitting on the desk.
3. A disagreement that no one has settled yet.
The argument about the rules is still an unfinished problem.
4. A question that has no answer yet.
Why the dinosaurs disappeared is an unfinished problem for scientists.