extortionate

形容词 extortionate:

1. greatly exceeding bounds of reason or moderation
   同义词：exorbitant, outrageous, steep, unconscionable, usurious

1. They are asking an extortionate amount of money for their house.
   他们的房子要价太高。
2. The prices in this shop are extortionate.
   这家商店价格过高。

ex.tor.tion.ate

adj.（形容词）
Characterized by extortion.
敲诈的，勒索的
Exorbitant; immoderate:
过高的；不合理的：
例句：
extortionate interest rates.
不合理的利息率

【引伸】
extor.tionately
adv.（副词）