Hermetic
Hermetic adjective - Difficult for one of ordinary knowledge or intelligence to understand.
Solid and hermetic are semantically related. In some cases you can use "Solid" instead an adjective "Hermetic".
Nearby Word: hermetically
Mutual synonyms
Cite this Source
Solid and Hermetic. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/hermetic/solid
Hermetic & Solid. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/hermetic/solid>.
Solid or Hermetic. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/hermetic/solid.
Google Ngram Viewer shows how "hermetic" and "solid" have occurred on timeline