tunnel

US /ˈtʌn.əl/
UK /ˈtʌn.əl/
"tunnel" picture
1.

an artificial underground passage, especially one built through a hill or under a building, road, or river

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The train passed through a long tunnel.
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They are building a new road tunnel under the river.
:
underpasssubwaypassagebore
1.

to make a tunnel through or under something

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The prisoners tried to tunnel their way out of the camp.
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Moles tunnel underground, creating complex networks.
:
digburrowexcavatemine
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tunnel vision