subterranean

as in underground
being, situated, or operating beneath the surface of the earth a subterranean bunker that supposedly could withstand even an atomic blast

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Cite this Entry

“Subterranean.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/subterranean. Accessed 18 Apr. 2024.

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