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English definition of “tunnel”

tunnel

verb [I or T]     /ˈtʌn.əl/ (-ll- or US usually -l-)
to dig a tunnel: The decision has not yet been made whether to tunnel under the river or build a bridge over it. The alternative is to tunnel a route through the mountain. He was trapped in a collapsed building but managed to tunnel his way out.DiggingDitches, dams and tunnels tunneller UK (US tunneler)     /r/ US  // noun [C]
(Definition of tunnel verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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