Subterranean: Definition and Part of Speech
Definition:
* adjective: Located or existing under the surface of the earth.
* adjective: Secret or hidden.
Part of Speech: Adjective
Examples:
* "The city's subway system is an extensive subterranean network." (meaning: located under the surface of the earth)
* "There were subterranean rumblings of discontent among the workers." (meaning: secret or hidden)
Etymology:
The word "subterranean" comes from the Latin words "sub" (under) and "terra" (earth).