tunnel

nouns

a passageway through or under something, usually underground (especially one for trains or cars)
"the tunnel reduced congestion at that intersection"
tunnel
domain category
a motor vehicle with four wheels; usually propelled by an internal combustion engine
"he needs a car to get to work"
auto, automobile, car, machine, motorcar
is a type of (narrower)
a passage between rooms or between buildings
passageway
a hole made by an animal, usually for shelter
burrow, tunnel

verbs

move through by or as by digging
"burrow through the forest"
burrow, tunnel
force a way through
tunnel
is a type of (narrower)
pass into or through, often by overcoming resistance
"The bullet penetrated her chest"
penetrate, perforate