Trick

1. A mischievous action; a prank. We played a trick on her on her birthday.
2. An act or a procedure intended to achieve an end by deception or fraudulent means. They tricked us and stole our money.
3. A special skill; a knack. Is there a trick to starting this engine?
4. An act of prostitution. A prostitute's customer. She did tricks every evening.
5. A convention or specialized skill peculiar to a particular field of activity. We learned the tricks of making good wine.