1.intervention:action taken to intentionally become involved in a difficult situation in order to improve or prevent it from getting worse.
EX:action taken to intentionally become involved in a difficult situation in order to improve it or prevent it from getting worse.
2.automation:the use of machines and computers that can operate without needing human control.
EX:Automation and robotics have decreased the need for a large, highly skilled work force.
3.far-fetched:very unlikely to be true, and difficult to believe.
EX:Her story about being chased away from school by wolves seems pretty far-fetched.
4.levitation:the act of rising and floating, or making someone rise or float, in the air without any physical support.
EX:One of his most famous illusions was levitation, in which he caused his wife to rise from the stage.
5.a space that has had all the air and any other gases removed from it.

EX:The withdrawal of troops from the area has created a security vacuum which will need to be filled.