tunnel

• 名词，指在地下或水下修建的通道，通常用于公路、铁路或管线等。

A noun referring to an underground or underwater passage, typically constructed for roads, railways, or utilities.

1. Underground passageA2formal

   An underground or underwater passage built for roads, trains, or pedestrians.

   隧道

   • The train passed through a long tunnel under the mountain.
   • Workers are digging a new tunnel for the subway system.
   • The tunnel connects the two sides of the river.

   同义词passagewaysubwayunderpass

2. Animal burrowB1formal

   A long, narrow underground passage made by an animal for shelter or travel.

   洞穴

   • The rabbit disappeared into its tunnel in the ground.
   • Moles create complex tunnels beneath the garden.
   • The fox dug a tunnel to reach the chicken coop.

   同义词burrowearthhole

3. Metaphorical passageB2informal

   A difficult or challenging period that one must go through to reach a better state.

   艰难时期

   • She felt like she was in a dark tunnel with no end in sight.
   • After months of hard work, he finally saw the light at the end of the tunnel.
   • The recovery process felt like a long tunnel, but he kept going.

   同义词hardshipordealpassagestruggletrial

• 动词，表示挖掘或建造穿过某物或在其下方通过的通道，或指在受限空间中穿行。

A verb used to indicate the act of digging or creating a passage through or under something, or to move through a confined space.

1. Dig a passageB2formal

   To dig or excavate a long, underground passage.

   挖隧道

   • The miners tunneled through the rock for months.
   • They are tunneling under the river to build a new subway line.
   • The prisoners tunneled their way out of the jail.

   同义词boreburrowdigdrillexcavateminesapundermine

2. Move through a narrow spaceB2informal

   To move or pass through a narrow or confined space.

   穿过狭窄空间

   • The rabbit tunneled into the snow to hide.
   • He tunneled through the crowd to reach the exit.
   • The roots tunneled deep into the soil.

   同义词burrowsqueezethreadwormwriggle