subsoil
nounmasculine/subˈsɔlu/medium
sub·so·lo
Definition
The layer of earth or rock that lies immediately below the surface soil.
The construction required deep excavations in the subsoil.
They found water in the property's subsoil.
Common collocations
subsoil layersubsoil waterdig into the subsoilexplore the subsoil
Etymology
Do latim 'sub' (sob) + 'solum' (solo).