contaminate
/kənˈtæmɪneɪt; kən`tæməˌnet/ v[Tn, Tn.pr]
~ sth/sb (with sth) make sth/sb impure by adding dangerous or disease-carrying substances 使某事物[某人]受污染
contaminated clothing, eg by radio-active material 受污染的衣物（如受放射性物质污染）
a river contaminated by chemicals 受到化学物质污染的河流
Flies contaminate food. 苍蝇可污染食物.
(fig 比喻) They are contaminating the minds of our young people with these subversive ideas. 他们这些颠覆作乱的思想是对我们年轻人的精神污染.