To make impure or not clean.
to pollute something or make it impure by adding a foreign substance. See our Clean Water & Your Health section for more information.
to make impure or unfit for use
To introduce an impurity into water, soil, materials, etc.
To make impure or unsafe by contact with potentially harmful substances.
make impure; "The industrial wastes polluted the lake"
To make impure or unclean by contact or mixture. Evaporate To change from a liquid form to a gas or vapour. Filter Filters are units designed to clean and clear water. There are three types: mechanical, biological, & chemical. show...
to introduce an impure substance into a clean or aseptic area; for example, dirt entering a wound. To infect.
Contaminate means to pollute, make unclean or dirty.
to make unsafe for drinking. A poisonous or polluting substance that makes impure that to which it is added.
to make impure, infected, corrupt or radioactive by contact with or by addition of something.
To make unclean or impure by the addition of harmful substances.
Allowing microorganisms to contact a sterile area, making it unsterile and creating potential for infection.
to make impure by infecting with unclean matterials
To pollute something, or make it dirty.
to make unfit for use; to pollute
The process by which an area may become infected through contact or association.
to make impure (not pure) by contact or addition of something; to pollute or soil
To make something impure, corrupt, infected, etc. by contact with or addition of something harmful or unsuitable.