un ‧ solved /ˌʌnˈsɒlvd◂ $ -ˈsɑːlvd◂, -ˈsɒːlvd◂/ BrE AmE adjective
[ Word Family: noun : ↑ solution , ↑ solvent , ↑ solubility , ↑ insolvency ; adjective : ↑ soluble ≠ ↑ insoluble , ↑ unsolved , ↑ solvent ≠ ↑ insolvent , ↑ solvable ≠ ↑ insolvable ; verb : ↑ solve ; adverb : ↑ insolvably ]
a problem, mystery, or crime that is unsolved has never been solved:
The murder still remains unsolved.