euthanize

[yoo-thuh-nahyz]
Also eu·than·a·tize [yoo-than-uh-tahyz] /yuˈθæn əˌtaɪz/; especially British, eu·tha·nise, eu·than·a·tise.

Origin of euthanize

First recorded in 1960–65; euthan(asia) + -ize
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for euthanise

euthanize

euthanise Austral euthanaze or euthanase (ˈjuːθəˌneɪz)

verb
  1. (tr) to kill (a person or animal) painlessly, esp to relieve suffering from an incurable illness

Word Origin for euthanize

C20: back formation from euthanasia
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for euthanise
v.

chiefly British English spelling of euthanize; for suffix, see -ize. Related: Euthanised; euthanising.

euthanize

v.

by 1915, in place of earlier and etymologically correct euthanatize (1873); see euthanasia + -ize. Related: Euthanized; euthanizing.

Online Etymology Dictionary, © 2010 Douglas Harper