tunnel

Noun
  1. A passageway through or under something, usually underground (especially one for trains or cars) (synset 104505257)
    "the tunnel reduced congestion at that intersection"
    referred to in: auto, automobile, car, machine, motorcar - a motor vehicle with four wheels; usually propelled by an internal combustion engine
    is a type of: passageway - a passage between rooms or between buildings
    subtypes:
    • catacomb - an underground tunnel with recesses where bodies were buried (as in ancient Rome)
    • railroad tunnel - a tunnel through which the railroad track runs
    • subway, underpass - an underground tunnel or passage enabling pedestrians to cross a road or railway
    has: shaft - a long vertical passage sunk into the earth, as for a mine or tunnel
  2. A hole made by an animal, usually for shelter (synset 109252948)
    is a type of: hole, hollow - a depression hollowed out of solid matter
    subtypes: rabbit warren, warren - a series of connected underground tunnels occupied by rabbits
    same as: burrow
Verb
  1. Move through by or as by digging (synset 202045912)
    "burrow through the forest"
    is a type of: cut into, delve, dig, turn over - turn up, loosen, or remove earth
    same as: burrow
  2. Force a way through (synset 201446656)
    is a type of: penetrate, perforate - pass into or through, often by overcoming resistance

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