Check
Check verb - To be in agreement on every point.
Unlock
Unlock verb - To set free (from a state of being held in check).
Usage example: that last insult unlocked her tongue, and she finally said what she really thought
Common collocations
Both words in one sentence
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Check the Permanent Redlink Club for it, and if it's not there, go to this forum thread and request an unlock.
Source: Administrivia / Dead Link -
Granted, there is a sixth night you can unlock, but it merely results in a slightly higher check and some overtime pay.
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Difficulty Levels: After beating the game, you are told to check the red machine in the intro and type "42" to unlock Hard Mode.
Cite this Source
Unlock and Check. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/check/unlock
Check & Unlock. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/check/unlock>.
Unlock or Check. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/check/unlock.
Google Ngram Viewer shows how "check" and "unlock" have occurred on timeline