decolonization [di:ˌkɑ:lənəˈzeɪʃn]

例句:

• To answer this question we must first understand the concept of decolonization.
  回答这个问题前首先要弄清殖民这个概念.
  
• The decolonization of the British Empire experienced four stages.
  英国的非殖民化经历了四个阶段.
  
• Special Political and Decolonization Committee ( Fourth Committee )
  特别政治和非殖民化委员会 ( 第四委员会 )