blackmailer [ˈblækˌmelɚ]

例句:

• An honest blackmailer who never blabbed without reason.
  来自C. Morgan
• The blackmailer had a hold over him.
  勒索他的人控制着他.
  
• The nasty thing about a blackmailer is that his starting point is usually the truth.
  勒索者的可恶之处在于他一开始往往是从事实入手的。
  
• The blackmailer will have to be bought off, or he'll ruin your good name.
  得花些钱疏通那个敲诈者, 否则他会毁坏你的声誉.
  
• I mean the only possibility is where it's required for a very short period to protect for example against a blackmailer.
  来自BBC