to make impure or unsuitable by contact or mixture with something unclean, bad, etc.

to contaminate a lake with sewage.

to render harmful or unusable by adding radioactive material to

to contaminate a laboratory.

something that contaminates or carries contamination; contaminant.

Obsolete . contaminated.

verb

clean , cure , heal , purify , sterilize

verb

alloy , befoul , corrupt , debase , debauch , defile , deprave , desecrate , dirty , harm , infect , injure , muck up , pervert , poison , pollute , profane , radioactivate , soil , spoil , stain , sully , taint , tarnish , vitiate , foul , adulterate , blight