Certain
Certain adjective - Known but not named.
Open
Open adjective - Not yet settled or decided.
Usage example: that issue will have to remain open until the supervisor can decide
Both words in one sentence
- NPC Scheduling: In Kandume, certain areas of the world only open up during certain times of day.
Source: Video Game / Li'l Monster -
Not only is it used to open the film itself, but also to open each character's story, by flipping backwards to a map and zooming in on a certain location.
Source: Western Animation / Hoodwinked -
Certain "keys" don't actually open a door but instead act as Plot Coupons that unlock harder difficulty modes.
Source: Interchangeable Antimatter Keys
Cite this Source
Open and Certain. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/certain/open
Certain & Open. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/certain/open>.
Open or Certain. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/certain/open.
Google Ngram Viewer shows how "certain" and "open" have occurred on timeline