to force an evil spirit to leave a person or place by using prayers or magic

After the priest exorcised the spirit/house/child, apparently, the strange noises stopped. 听说在牧师驱除了邪魔／驱除了房子里的妖气／给孩子驱魔后，奇怪的噪音就没有了。

to remove the bad effects of a frightening or upsetting event

It will take a long time to exorcise the memory of the accident. 要花很长时间才能驱散事故留下的阴影。