The killing of one's brother (or sister).
A person who commits fratricide.
The intentional or unintentional killing of a comrade in arms.
The undesirable situation where the separate missiles from a MIRV interfere with each other as they explode.
Someone suicidal; someone likely to kill themselves.
Likely to commit, or to attempt to commit, suicide.
Extremely reckless.
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.
Pertaining to suicide.