Longman Dictionary of Contemporary English homepage

decontaminate

 verb
     
de‧con‧tam‧i‧nate [transitive]
to remove a dangerous substance from somewhere [↪ contamination]:
It may cost over $5 million to decontaminate the whole site.
—decontamination noun [uncountable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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