Select the option that can be used as a one-word substitute for the given group of words.

Killing one self

Suicide

The option that can be used as a one-word substitute for the given group of words is suicide.

• Regicide means the killing of a king or queen.
• Homicide means the killing of one human being by another.
• Matricide means the killing of one's mother.
• Suicide means the killing of oneself.