subterraneous

• Adjectif désuet signifiant qui est situé, se produit ou existe sous la surface de la terre ; souterrain.

An obsolete adjective meaning existing, situated, or occurring beneath the surface of the earth; underground.

1. Located or operating undergroundC1formal

   Existing, situated, or functioning beneath the surface of the earth.

   souterrain

   • The subterraneous tunnels were used for mining operations.
   • Subterraneous rivers flow through limestone caves.
   • The city has an extensive subterraneous network of pipes and cables.

   Synonymesbelowgroundsubsurfacesubterraneanunderground

   Antonymesabovegroundsurface

2. Hidden or concealedC2formal

   Kept out of sight or deliberately hidden from public knowledge; operating in the background.

   caché, secret

   • The organization had a subterraneous influence on political decisions.
   • There were subterraneous motives behind his seemingly generous offer.
   • The subterraneous tensions within the group eventually surfaced.

   Synonymesclandestineconcealedcoverthiddensecretsurreptitiousundercoverunderground

   Antonymesexposedopenovertpublicvisible