/ ˌsuːɪˈsaɪdl; NAmE ; BrE also ˌsjuːɪ-/ adjective
1.
people who are suicidal feel that they want to kill themselves :
On bad days I even felt suicidal.
suicidal tendencies
2.
very dangerous and likely to lead to death; likely to cause very serious problems or disaster :
a suicidal leap into the swollen river
It would be suicidal to risk going out in this weather.
The new economic policies could prove suicidal for the party.
► sui·cid·al·ly / -dəli; NAmE / adverb :
suicidally depressed