Certain
Certain adjective - Known but not named.
Unsolved
Unsolved adjective - Not solved.
Both words in one sentence
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Helps that there's always certain tidbits that remain completely unsolved to this day.
Source: Video Game / Fallen London -
If you don't want the normal or bad endings, which leave several problems unsolved, you'll still need to keep several spare save files in case you miss or lose certain items from solving puzzles the wrong way.
Cite this Source
Unsolved and Certain. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/certain/unsolved
Certain & Unsolved. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/certain/unsolved>.
Unsolved or Certain. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/certain/unsolved.
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