1. 敲诈的：extortionary 勒索的 | extortionate 敲诈的 | extortioner 敲诈者

2.

2. 敲诈性：以伪职或专营权进行勒索-----extortion by colour of office or franchise | 敲诈性-----extortionate | 摘录-----extract

3. 敲诈的/勒索的/过高的/昂贵的：extortionary /勒索的/硬要的/敲诈性的/ | extortionate /敲诈的/勒索的/过高的/昂贵的/ | extortioner /勒索者/敲诈者/

4. 勒索的; 过多的; 强求的 (形)：extortion 勒索; 强取; 敲诈 (名) | extortionate 勒索的; 过多的; 强求的 (形) | extortioner 勒索者; 敲诈者 (名)

1. （价格等）过高的，离谱的
    If you describe something such as a price as extortionate, you are emphasizing that it is much greater than it should be.

1. greatly exceeding bounds of reason or moderation

    e.g. exorbitant rent
           extortionate prices
           spends an outrageous amount on entertainment
           usurious interest rate
           unconscionable spending

    Synonym: exorbitantoutrageoussteepunconscionableusurious