concertina

• 名词，指一种类似手风琴的便携式簧片乐器，也指用作防御屏障的螺旋状带刺铁丝网。

A noun referring to either a portable free-reed musical instrument similar to an accordion, or a type of coiled barbed wire used as a defensive obstacle.

1. Barbed wire obstacleB2formal

   A type of coiled barbed wire used as a defensive barrier or obstacle, often in military or security contexts.

   铁丝网障碍

   • The soldiers set up concertina wire around the perimeter.
   • Concertina wire is often used to secure borders.
   • The fence was topped with coils of concertina wire.

   同义词barbed wire

2. B1formal

   A free-reed musical instrument, similar to an accordion, that is played by squeezing the ends together to force air through the reeds.

   六角手风琴

   • She played a beautiful tune on the concertina.
   • The folk musician carried a concertina to the festival.
   • He learned to play the concertina from his grandfather.

• 动词，指像手风琴的褶皱一样折叠、挤压或压扁某物，常用于描述车辆或物体在事故中被压扁挤在一起。

A verb meaning to fold, collapse, or compress something in a manner resembling the bellows of a concertina, often used to describe vehicles or objects being crushed together in an accident.

1. Collapse or compressC1informal

   To fold, collapse, or compress into a series of folds, resembling the bellows of a concertina.

   折叠压缩

   • The car's front end concertinaed on impact with the wall.
   • The metal tube concertinaed under the immense pressure.
   • The accordion-like structure concertinaed when the weight was applied.

   同义词accordioncollapsecompresscrumplefoldpleat

   反义词expandextendstretchunfold