Her friends are worried that she might be 'suicidal'. [=that she might want to kill herself]
He knows that supporting a tax increase would be politically 'suicidal'.
psychiatrists working with 'suicidal' patients
(..) bankrupted his-- In-law's dealership. He takes out your knees and ruins your life and anybody you know. You scared? You suicidal? Only in the morning . -Now what? -Now comes the girl . She comes down after him if they' re in a snit. (..)2001 Ocean's Eleven