From Longman Dictionary of Contemporary Englishcommit suicidecommit suicideto kill yourself deliberately → commit
Examples from the Corpus
commit suicide• Isaacs denied trying to help his brother commit suicide.• After the cremains were found last June in a collapsed storage locker, Vieira committed suicide.• Only by restoring his muscle spasm had he been able to conquer the impulse to commit suicide.• The Minister of Law and Order denied any police responsibility and suggested that many of those who died had committed suicide.• The second time, like the first, no one could say for certain she had been trying to commit suicide.• Elaine Blond observed that he had committed suicide by stages.• The Gamester also ended tragically when Beverly, a gambler, falsely accused of murder, committed suicide by taking poison.• But Grundberg committed suicide June 22,1994.• I have tried to commit suicide many times, but I couldn't do it. 