decontaminate

[dee-kuhn-tam-uh-neyt]
verb (used with object), decontaminated, decontaminating.
1.
to make (an object or area) safe for unprotected personnel by removing, neutralizing, or destroying any harmful substance, as radioactive material or poisonous gas.
2.
to make free of contamination; purify: to decontaminate a sickroom.

Origin:
1935–40; de- + contaminate

decontamination, noun
decontaminative, adjective
decontaminator, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
decontaminate (ˌdiːkənˈtæmɪˌneɪt)
 
vb
(tr) to render (an area, building, object, etc) harmless by the removal, distribution, or neutralization of poisons, radioactivity, etc
 
decon'taminant
 
n
 
decontami'nation
 
n
 
decon'taminative
 
adj
 
decon'taminator
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

decontaminate
1936, from de- + contaminate. Originally in reference to poison gas.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Alcohol-based hand products decontaminate your hands only when they are already
  visibly clean.
Previous attempts to decontaminate buildings have been incomplete, or
  improperly done.
Others are installing and operating systems to decontaminate radioactive water.
Enzyme sprays could also be used in the food industry to decontaminate food, he
  says.
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