noun

tunnel

tunnel

The train goes through a long tunnel.

The train goes through a long tunnel.

a/an ((tunnel)) ((through/under sth.)) a passage built underground The train goes through a long tunnel.

Synonyms: passage, subway, underpass, channel

From Old French 'tonnel' meaning 'cask' or 'net', referring to its tube-like shape.

Imagine a train going through a tube. A 'ton' of earth is moved to make a 'tunnel'.

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