tunnel
US /ˈtʌn.əl/
UK /ˈtʌn.əl/

1.
túnel
an artificial underground passage, especially one built through a hill or under a building, road, or river
:
•
The train passed through a long tunnel.
O trem passou por um longo túnel.
•
They are building a new road tunnel under the river.
Eles estão construindo um novo túnel rodoviário sob o rio.
1.
cavar um túnel, perfurar
to make a tunnel through or under something
:
•
The prisoners tried to tunnel their way out of the camp.
Os prisioneiros tentaram cavar um túnel para sair do campo.
•
Moles tunnel underground, creating complex networks.
As toupeiras cavam túneis subterrâneos, criando redes complexas.