contaminate

verbs

make impure
"The industrial wastes polluted the lake"
contaminate, foul, pollute
is derived from
contaminative
is derived from
contamination
is derived from
contamination
is derived from
contamination
is derived from
contaminant
make radioactive by adding radioactive material
"Don't drink the water--it's contaminated"
contaminate
is derived from
contaminative
is derived from
contamination
is derived from
contamination
is derived from
contamination
antonym
decontaminate
is a type of (narrower)
cause to change; make different; cause a transformation
"The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue"
alter, change, modify