History
History
History
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US
Meaning:
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an underground passage, especially through a hill or mountain, used for a road, railway etc

covered passageway

channel hole mine pit shaft subway underpass adit burrow crosscut drift passage tube crawl space crawlway hole in the wall
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Cases of word usage

1) to make a hollow or tunnel under (an area of ground); to weaken (health, confidence etc) gradually (undermine)

TUNNEL as in Wiktionary
TUNNEL as in Wikipedia