[{"Bold_text": "verb (used with object)", "List Items": ["to make impure or unsuitable by contact or mixture with something unclean, bad, etc.:to contaminate a lake with sewage.Synonyms: corrupt , poison , infect , taint , pollute , defile", "to render harmful or unusable by adding radioactive material to:to contaminate a laboratory."]}, {"Bold_text": "noun", "List Items": ["something that contaminates or carries contamination ; contaminant ."]}, {"Bold_text": "adjective", "List Items": ["Obsolete.contaminated."]}]