Tunnel ˈtʌnl Railway/Railroad Noun Bre Channel Service Runs

• a railway/railroad tunnel
• the channel tunnel
• a service tunnel runs between the two buildings.
• adriana hid in the tunnel connecting the house with the stables.

tunnel

1. a passage built underground, for example to allow a road or railway/railroad to go through a hill, under a river, etc.
• see also wind tunnel
  https://www.oxfordlearnersdictionaries.com/definition/english/wind-tunnel
• a railway/railroad tunnel
• the Channel Tunnel
2. an underground passage made by an animal
3. something that shows you are nearly at the end of a long and difficult time or situation

Extra Examples

• A service tunnel runs between the two buildings.
• Adriana hid in the tunnel connecting the house with the stables.
• The badger sett had twelve entrances to what must have been a labyrinth of tunnels.
• The initial section of tunnel had to be dug by hand.
• The train disappeared into a tunnel.
• The tunnel opened out into a large cavern.
• They’ve built a new tunnel through the mountain.
• We got lost in the maze of tunnels.
• a tunnel leading into the hill
• a vast network of secret underground tunnels
• a wind tunnel for aerodynamic experiments
• the end of the long, winding tunnel
• the tunnel system below the building

Word Origin

• late Middle English (in the senses ‘tunnel-shaped net’ and ‘flue of a chimney’): from Old French tonel, diminutive of tonne ‘cask’. The current noun senses date from the mid 18th cent.