also subterraneous adjective see: thirst Date: 1603 being, lying, or operating under the surface of the earth, existing or working in secret ; hidden , ~ly also subterraneously adverb
SUBTERRANEAN
Meaning of SUBTERRANEAN in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012