Key
Key adjective - Coming before all others in importance.
Usage example: maintains that Sir Isaac Newton remains the key figure in physical science
Trivial
Trivial adjective - Lacking importance.
Usage example: why spend so much time on trivial decisions, like whether the soda should be regular or diet?
Both words in one sentence
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Getting back to Earth is a key part of a few of the villains' plots, but by-and-large humanity has forgotten about it except as a piece of trivial history.
Source: Insignificant Little Blue Planet -
Heart Is an Awesome Power: Nike's powers appear trivial at first, however the key to the rain is the manipulation of the surrounding air pressure.
- Reverse-engineering an algorithm when one got a key and a ciphertext sample (but no cleartext sample) might be theoretically possible when the algorithm isn't very complex, but when the algorithm is as sophisticated as claimed, this would be anything but trivial.
Source: Dan Browned / Dan Brown
Cite this Source
Trivial and Key. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/key/trivial
Key & Trivial. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/key/trivial>.
Trivial or Key. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/key/trivial.
Google Ngram Viewer shows how "key" and "trivial" have occurred on timeline