ETYM Latin sui of one's self (akin to suus one's own) + caedere to slay, to kill. Related to So, Homicide.
The act of killing oneself intentionally; a person who does this.
It is often considered a crime in law, with consequences for a suicide's estate, or criminal prosecution for unsuccessful attempt. It is also a crime in terms of some religious laws. Aiding and abetting another's suicide is often considered illegal. Survivors of joint suicides may be charged with manslaughter. In some cultures, suicide is considered honorable behavior, such as suicide in ancient Rome, historic hara-kiri in Japan, or historic suttee in India.
1. A person who kills himself intentionally; SYN. felo-de-se.
2. Killing oneself; SYN. self-destruction, self-annihilation.

Of or relating to suicide; especially; being or performing a deliberate act resulting in the voluntary death of the person who does it

1. To commit suicide
2. To put (oneself) to death