suicidal
From Longman Dictionary of Contemporary Englishsuicidalsu‧i‧cid‧al /ˌsuːəˈsaɪdl◂, ˌsjuː- $ ˌsuː-/ adjective 1 KILLwanting to kill yourself She was depressed and almost suicidal. For many years before treatment, Clare had suicidal tendencies (=behaviour that showed she wanted to kill herself).2 DANGEROUSlikely to lead to death It was suicidal trying to put out that fire.3 PROBLEMlikely to lead to a lot of damage or trouble Her economic policies would prove suicidal for our economy.