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subterranean

subterranean

20 7.4
Under the earth's surface
  • adjective
  • /ˌsʌbtəˈreɪniən/
translation icon : subterráneo
  • The archaeologists discovered a subterranean chamber filled with ancient artifacts.
  • subterranean termite
  • subterranean aquifers
  • subterranean layer

The Marcellus Shale, our bedrock, our subterranean coral reef.

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Examples

  • The engineers designed a complex subterranean shelter complete with a state-of-the-art sanitary leach field.

    Fiction book (2000)
  • Since 1982, the center has been located on a subterranean level next to a basement parking garage.

    Academic text (1996)
  • Looks to me like a subterranean lake.

  • Why did they abandon that city and move to this subterranean world?

  • It's a subterranean tunnel system that connects the entire planet.

  • Welcome to the most advanced subterranean neuroscientific laboratory on earth.

  • You know, I've been in subterranean passageways very deep within ancient mountains that had more light than this.

  • Now, in the midst of their descent into the subterranean catacombs, they were beginning to tire.

    Fiction book (1995)
  • In Rome, subterranean catacombs house both cremation urns and intact remains.

  • Huge water tanks, long subterranean service tunnels, a lakeside grotto sparkling with mosaics.

Synonyms

underground
vssubterranean
327 3.0

Beneath the surface of the ground, under soil or rock

refers more to simple location beneath the earth rather than activity
subsurface
vssubterranean
6 6.3

Under the ground or below the top layer of a place

applies specifically to being under the earth's surface
subterraneous
vssubterranean
8.8

Existing under the surface of the earth, like pipes or caves

is the common term used for this meaning
subterrene
vssubterranean
9.6

Found under the ground and out of sight

is the broader everyday word for being under the earth
belowground
vssubterranean
4.3

Under the ground surface

is the more formal, technical label for that below ground position
hypogeous
vssubterranean
  • Specialized
9.9

Living under the ground, for example fungi and seeds

uses the same below-earth idea but for general things

Antonyms

3.4

On the outside or top layer of something

How Deep

subterranean
20 7.4
subsurface
6 6.3
surface
3.4

Surface Forms

subterranean positive

Morphology

subterranean = terrain (semi-transparent) = sub + terra + anean

The prefix 'sub-' clearly indicates 'below', but the suffix 'anean' is less familiar to learners.

Etymology

Subterranean comes from the Latin parts sub- 'under' and terra 'earth', the same root you see in terrain. So it literally means 'under the earth', which helps you remember it for things like underground water, tunnels, or animals that live below the ground.