suicidal

Pertaining to suicide.

• He is an authority on the precursors of suicidal behavior.

Of a person, likely to commit, or to attempt to commit, suicide.

• After losing his job, his wife, and his leg in a single week, he became suicidal.

Of a voluntarily-chosen course of action, 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.

• Now, that, admittedly, did do an awful lot more damage (the 5th and 6th were almost completely wiped out), but the High Seas Fleet was, in turn, almost completely wiped out (in fact, basically was wiped out, to a man) by the oncoming rest o

Extremely reckless.excessiveinformal

• His driving habits are utterly suicidal.

Someone suicidal; someone likely to kill themselves.