Foxes usually build their homes underground, often at the base of a tree.
The government is losing more and more money in taxes each year due to the increase in the underground economy.
We were digging in our backyard, and accidentally broke an underground water pipe.
These
animals live underground and never come up to the surface.
There must be an underground spring near here; the ground is quite wet.
The cable is buried underground so it'll be difficult to find the spot where it broke.
The nuclear power plant is proposing they bury their waste
underground in huge cement containers.
The surveyors found evidence of underground deposits of oil and gas.
After the events at Tiannenman Square, many dissidents in Mainland China were forced to go underground.
She is a leader of the underground democratic movement in
Burma.
Pesticides from farms have polluted the underground water supply.
The jet crashed so hard that the nose of the aircraft was buried 15 feet underground.
We took the underground to Trafalgar Square to see Nelson's Monument.
Emile Zola once said that if you shut up truth, and bury it underground, it will still grow.
The people living in the desert here know where to find hidden, underground sources of water.
Find someone who has been underground.