IPA: //ʌnˈsɒlvd//
KK: /ʌnˈsɑlvd/
Describing something that has not been resolved or figured out yet.
The mystery remains unsolved after many years.
Unsolved → It is formed from "un-" (meaning not) and "solvere" (meaning to loosen or solve). The word "unsolved" means not solved or unresolved.
Think of 'not' ('un-') having been able to 'solve' ('solvere') something — that's why unsolved means something that remains unresolved.