n.

1. 【魚】鯊魚[C]
   They were killed by a shark.

   他們被一條鯊魚咬死。

n.[C]

1. 貪婪狡猾的人；放高利貸者；詐騙者
2. 【俚】能手，內行，專家
   a shark at bridge

   打橋牌的好手

vt.

1. 敲詐，詐取

vi.

1. 詐騙，行騙

n.

1. a long-bodied cartilaginous marine fish, typically predatory and voracious, with a prominent dorsal fin. [Many species in the subclass Elasmobranchii.]
2. a small black SE Asian freshwater fish. [Labeo bicolor and Morulius chrysophekadion.]
3. a light greyish-brown moth. [Cucullia umbratica.]

n.

1. a person who exploits or swindles others.
2. US an expert in a specified field:
   a pool shark.