单词：shortener 

名词

• 
  [1.n.shortener] (同义词:[shortener( 缩短器 )]  )
• 
  注释列句：any agent that shortens; "alcohol is a great shortener of life"
• 上位词 -> [agent( n. 代理(商) )]  [causal_agent]  [physical_entity]  [entity( n. 实体 )] 
• 派生词 -> [shorten( v. 缩短, (使)变短 )]  [shorten( v. 缩短, (使)变短 )]  [shorten( v. 缩短, (使)变短 )]