Unsolve vs. Unsolved

Unsolveverb

(obsolete) To solve.

Unsolvedadjective

Not yet solved.

‘an unsolved crime’; ‘an unsolved crossword puzzle’;

Unsolveverb

To undo or remove the solution to a problem; to put something into an unsolved state.

Unsolvedadjective

not solved;

‘many crimes remain unsolved’; ‘many problems remain unresolved’;