The word "unanswered" means not having a reply or solution to something. It refers to a question, problem, or situation that remains without an answer or resolution.
In difficult financial times, when important positions and programs have been cut to stay within statutory budget caps, it's difficult to effectively implement these initiatives with so many unanswered questions remaining. (nj.com)
Of the many serious questions going unanswered by our candidates, the most important one is, How? (fortune.com)
I had a lot of unanswered of questions as I know you do. (fedisbest.org)