Unresolved (adjective)

1. Not having been dealt with or sorted out.
2. Not having come to a conclusion.

Origin:

Late 16th century: from un-1 (expressing negation) + resolved.

Examples:

1. The issue remains unresolved and requires further discussion.
2. The conflict between the two countries was unresolved for many years.
3. The problem was unresolved and therefore couldn't be fixed.
4. Her feelings about the situation were unresolved.
5. The case was unresolved and still being investigated by the police.