Deepest
Underlying and deepest are semantically related. In some cases you can use "Underlying" instead an adjective "Deepest".
Underlying
Underlying adjective - Of or relating to the simplest facts or theories of a subject.
Deepest and underlying are semantically related. Sometimes you can use "Deepest" instead an adjective "Underlying".
Both words in one sentence
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Even if each group doesn't, cannot or elects not to understand the deepest inner workings of another group's near-magical technology, they accept that there's a rational, scientific basis underlying it.
Source: Clarke's Third Law
Cite this Source
Underlying and Deepest. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/deepest/underlying
Deepest & Underlying. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/deepest/underlying>.
Underlying or Deepest. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/deepest/underlying.
Google Ngram Viewer shows how "deepest" and "underlying" have occurred on timeline