This is the 4529th most frequent Chinese word.
杀害
"杀害" means "to kill" or "to murder."
The word '杀害' is used as a noun indicating the act of killing.
警察正在调查那起杀害事件。
The police are investigating that murder case.
Here, '杀害' is used as a verb describing the act of committing murder.
那名恐怖分子杀害了许多无辜的平民。
That terrorist killed many innocent civilians.
In this sentence, '杀害' is used as a noun referring to the general concept of killings.