euthanize in British English
or euthanise (ˈjuːθəˌnaɪz), Austral euthanaze or euthanase (ˈjuːθəˌneɪz)
verb(transitive) to kill (a person or animal) painlessly, esp to relieve suffering from an incurable illness
Also called: euthanatizeWord origin
C20: back formation from
euthanasia