0 a tool, usually with a metal blade and a handle, used for cutting and spreading food or other substances, or as a weapon -- 刀
1 to attack someone using a knife -- 用刀砍（或刺、戳）
He knifed her in the back. 他用刀砍傷了她的背部。
Your table manners are appalling - don't you know how to use a knife and fork?
He said that the man had pointed a knife at him.
You really need a knife with a serrated edge for cutting bread.
In the car the police found guns, knives and other lethal weapons .
