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Meaning of base tunnel | Babel Free

Noun CEFR B2

Definitions

A tunnel driven through the base of a mountain pass, rather than through the upper slopes of the mountains.

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

base unit base wallah base year base-ball Base-N base-on-balls