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[yoo-thuh-nahyz] /ˈyu θəˌnaɪz/
verb (used with object), euthanized, euthanizing.
to subject to euthanasia:
to euthanize injured animals.
Also, euthanatize
[yoo-than-uh-tahyz] /yuˈθæn əˌtaɪz/ (Show IPA).
especially British, euthanise, euthanatise.
Origin of euthanize
First recorded in 1960-65; euthan(asia) + -ize Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for euthanize
Contemporary Examples
  • The three-drug formula, Alper writes, is “less reliable, and therefore less humane, than the method used to euthanize animals.”

    Executed Like a Dog Ben Crair November 13, 2010
British Dictionary definitions for euthanize


(transitive) to kill (a person or animal) painlessly, esp to relieve suffering from an incurable illness
Word Origin
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
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Word Origin and History for euthanize

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

Online Etymology Dictionary, © 2010 Douglas Harper
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