arsonist [ˈɑ:rsənɪst]

例句:

• Giving an arsonist a lighter is beyond a joke.
  把打火机交给纵火犯简直是不可理喻。
  
• You're pretty sure you can identify a single arsonist?
  你确信你能鉴别出一个特定的纵火者?
  
• Within two hours the arsonist was taken up by the police.
  纵火犯在两小时内就被警察抓住了.