It's a combination word made up from Channel and Tunnel. The word "chunnel" is no longer used. It is called the Channel Tunnel.
England
At the moment - it's called 'Eurotunnel'.
Chunnel (also called channel tunnel)
The Chunnel is an out-of-date name for the Channel Tunnel.
No-one calls it the chunnel, that was just a newspaper headline in the 1970s.The Channel Tunnel passes under the English channel, or la Manche, between Folkestone and Calais.
The chunnel comes out in Coquelles, a village near Calais.
The chunnel (actually the Channel Tunnel) connects England to France.
tunnel, cave, catacomb, burrow, shaft, drift, adit, chunnel
nothing
The Euro tunnel is a like a train which carries transport across the English Channel connecting Britain and France. Sometimes the euro tunnel is called the CHunnel because it is a tunnel going through a channel so....chunnel!
The Chunnel runs underneath the English Channel, connecting England and France.