Also means
underground
Usage Note
Sottosuolo is a compound of sotto (under) + suolo (soil/ground). It refers specifically to the layer of earth beneath the topsoil or to the underground space beneath buildings. In legal and geological contexts it distinguishes what lies below the surface from the suolo above — ownership of il sottosuolo is often regulated separately from land surface rights in Italian law.
Examples
"Il sottosuolo è ricco di minerali."
Natural Translation
The subsoil is rich in minerals.

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