su ‧ i ‧ cid ‧ al /ˌsuːəˈsaɪdl◂, ˌsuːɪˈsaɪdl◂, ˌsjuː- $ ˌsuː-/ BrE AmE adjective
1 . wanting 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 . likely to lead to death:
It was suicidal trying to put out that fire.
3 . likely to lead to a lot of damage or trouble:
Her economic policies would prove suicidal for our economy.