as in cave
a passage that goes under the ground, through a hill, etc. The train goes through a tunnel in the mountain. The moles dug tunnels in the yard.

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Cite this Entry

“Tunnel.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/tunnel. Accessed 4 Feb. 2023.

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