subterranean
/ˌsʌbtəˈɹeɪniən/ adjective, noun
Forms subterraneans
- adjective Below ground, under the earth, underground.
- adjective (by extension) Secret, concealed.
- noun Someone or something that is subterranean.
Synonyms
subterraneous subterrene underground hypogean belowground chthonian chthonic cuniculate ulterior
Antonyms
Etymology
From Latin subterrāneus + -an. Compare subterrane and subterraneous.
Webster’s 1913
- adjective Being or lying under the surface of the earth; situated within the earth, or under ground; as, subterranean springs; a subterraneous passage.
Etymology [L. subterraneus; sub under + terra earth. See Terrace.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “subterranean”, CC BY-SA 4.0. Details