subterranean
/sub-tuh-RAY-nee-un/adjectiveexisting or operating below the earth's surface; hidden
“A subterranean river runs beneath the old quarter.”
- Synonyms
- underground, buried, hidden
- Antonyms
- surface, aboveground
- Root
- sub- (under)
- Memory hook
- sub (under) + terra (earth): under the earth.
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