subterranean tunnel
Frequency: 5.53.4 per million words
a tunnel existing or situated under the earth's surface
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Examples (10)
- The ancient city was protected by a network of subterranean tunnels.
- Explorers discovered a hidden subterranean tunnel beneath the ruins.
- Engineers are planning to construct a new subterranean tunnel for the railway line.
- The escape route involved navigating a long, dark subterranean tunnel.
- A complex system of subterranean tunnels connected the various bunkers.
- Water seeped through the walls of the old subterranean tunnel.
- Could this subterranean tunnel lead to an undiscovered cave system?
- The miners worked tirelessly to extend the subterranean tunnel deeper into the mountain.
- Historians believe the castle had a secret subterranean tunnel for emergencies.
- Modern infrastructure often relies on extensive subterranean tunnels for utilities.