| Answer | Crossword Clue |
|---|---|
| TOUGH | Not easily solved |
| UNMET | Not solved. |
| unsolved | Not solved |
| unsolved | not solved |
| UNMET | Not yet solved. |
| HARD | Not quickly solved |
| UNMET | Not yet solved or considered |
| UNMET | Not yet considered or solved |
| unsolvable | Not able to be solved |
