For G-C, who apparently cannot use the internet:
eu·tha·na·sia
[yoo-thuh-ney-zhuh, -zhee-uh, -zee-uh]
noun
1.
Also called mercy killing. the act of putting to death painlessly or allowing to die, as by withholding extreme medical measures, a person or animal suffering from an incurable, especially a painful, disease or condition.
2.
painless death.
eu·tha·na·sia
[yoo-thuh-ney-zhuh, -zhee-uh, -zee-uh]
noun
1.
Also called mercy killing. the act of putting to death painlessly or allowing to die, as by withholding extreme medical measures, a person or animal suffering from an incurable, especially a painful, disease or condition.
2.
painless death.