Involving the danger of death; fatal, deadly.
Subject to death; mortal.
Resembling or pertaining to death; deathly.
Highly likely to certain to result in the deaths of the participants; dangerous or reckless to such a degree as to be tantamount to suicide for those taking part.
Likely to commit, or to attempt to commit, suicide.
Extremely reckless.
Pertaining to suicide.
Someone suicidal; someone likely to kill themselves.