a den or burrow
Burrow
A drift mine is a type of underground mine. Were a tunnel OS dug at the side of a hill
The Persians took advantage of gravity to make qanat's work. A qanat was an underground tunnel that allowed underground spring water to flow down from the mountains and into canals. Along the underground tunnel were vertical shafts dug 20-30 meters apart to allow for ventilation and repairs.
By defintion, a tunnel is underground.
A burrower is a creature who burrows, or who lives in an underground hole which they have made themselves.
The grey wolf's shelter is usually a den dug in the ground on a hillside or it can be underground with a tunnel about three meters long leading to where the cubs are.
There is no underground tunnel.
Animals that live underground are classified as subterranean dwellers. They use tunnels to travel and create dens and multiple entries and exits. The common name for a tunnel is a burrow.
Mining is removing a mineral or metal from the earth to use it or sell it. When the substance being mined is close to the surface, it is simply dug out of the ground (surface mining). However, if the substance is deep underground, a shaftway may be dug to reach the material, much like a tunnel. That is underground mining.
No, the noun 'tunnel' is a concretenoun, a word for an underground passage made by humans or animals, a word for a physical thing.The word 'tunnel' is also a verb: tunnel, tunnels, tunneling, tunneled.
yes they did
it is an adjective because it is describing something.ex. the tunnel is underground-it describes where the tunnel is :)