felo-de-se

[fel-oh-di-see, -sey]

a person who commits suicide or commits an unlawful malicious act resulting in his or her own death.

the act of suicide.

Origin of felo-de-se

1645–55; < Anglo-Latin, equivalent to felō a felon + dē in respect to, of + sē oneself

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Felo-de-se, in English law the crime which a man at the age of discretion and of a sound mind commits when he takes away his life.
The Nuttall Encyclopaedia
Edited by Rev. James Wood

Word Origin and History for felo-de-se

Latin, "suicide," literally "one guilty concerning himself."