blackmailer

n.勒索者；敲诈者

The blackmailer bled him for $20000. 勒索者勒索他两万美金。

When you pay off a blackmailer, she gets your money, but all you get is her word not to disclose. 当你付钱给勒索者时，她拿走你的钱，但你得到的只是她不去揭露的承诺。