Tunneling

v. dig a tubular passage, create a tunnel

Tunneling may refer to:Digging of tunnels (the literal meaning)Sapping, or tunneling during a siegeQuantum tunnelling, a quantum-mechanical effect of transitioning through a classically-forbidden energy stateTunneling (fraud), a fraud committed by a company's own management or by major shareholdersTunneling protocol, transmitting one computer network protocol that is encapsulated inside another network protocolUrban exploration, the exploration of public utility tunnels by unauthorized people
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Tunnel /tun·nel/ a passageway of varying length through a solid body, completely enclosed except for the open ends, permitting entrance and exit. [more]Tunneling - Community and Resources

Noun
1. a passageway through or under something, usually underground (especially one for trains or cars); "the tunnel reduced congestion at that intersection"
(hypernym) passageway
(hyponym) catacomb
(classification) car, auto, automobile, machine, motorcar
2. a hole in the ground made by an animal for shelter
(synonym) burrow
(hypernym) hole, hollow
(hyponym) warren, rabbit warren
(derivation) burrow
Verb
1. move through by or as by digging; "burrow through the forest"
(synonym) burrow
(hypernym) dig, delve, cut into, turn over
(derivation) burrow
2. force a way through
(hypernym) penetrate, perforate

(p. pr. & vb. n.)
of Tunnel