Essential
Essential adjective - Of or relating to the simplest facts or theories of a subject.
Usage example: anyone with an essential knowledge of human biology can follow the documentary
Simple and essential are semantically related in basic topic. In some cases you can use "Simple" instead an adjective "Essential".
Both words in one sentence
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For many fans, this was when Simple Minds Jumped the Shark; MacNeil's Heroic Fantasy-evoking keyboards were essential to the band's sound.
Source: Music / Simple Minds - Kudzu Plot: Well, the actual plot may be quite simple when you strip away all the non-essential details.
Source: Literature / The Forsyte Saga -
The essential problem is that what would otherwise be relatively simple force magic is complicated by the fact that the force itself is 1.
Source: Functional Magic aka: Magic
Cite this Source
Simple and Essential. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/essential/simple
Essential & Simple. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/essential/simple>.
Simple or Essential. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/essential/simple.
Google Ngram Viewer shows how "essential" and "simple" have occurred on timeline