SUICIDAL

[adjective]People who are suicidal want to kill themselves or are in a mental state in which it is likely that they will try to do so.Pete was so depressed after she left him that I actually thought he was suicidal.Prisoners with suicidal tendencies are closely observed throughout their stay.Suicidal behaviour is likely to result in death.He took a suicidal leap from one roof to the next.(figurative) It would be suicidal for the Prime Minister to call an election at a time when he's so unpopular (= It would cause his own defeat).