de·con·tam·i·nate 
(dē′kən-tămə-nāt′)
(dē′kən-tămə-nāt′)tr.v. de·con·tam·i·nat·ed, de·con·tam·i·nat·ing, de·con·tam·i·nates
1. To eliminate contamination in.
2. To make safe by eliminating poisonous or otherwise harmful substances, such as noxious chemicals or radioactive material.
de′con·tami·nant (-nənt) n.
de′con·tam′i·nation n.
de′con·tami·na′tor n.