a substance with an inherent property that tends to destroy life or impair health.

something harmful or pernicious, as to happiness or well-being

the poison of slander.

Slang . any variety of alcoholic liquor

Name your poison!

to administer poison to (a person or animal).

to kill or injure with or as if with poison.

to put poison into or upon; saturate with poison

to poison food.

to ruin, vitiate, or corrupt

Hatred had poisoned his mind.

Chemistry . to destroy or diminish the activity of (a catalyst or enzyme).

causing poisoning; poisonous

a poison shrub.

noun

antidote

verb

purify , sterilize

noun

adulteration , bacteria , bane , blight , cancer , contagion , contamination , corruption , germ , infection , malignancy , miasma , toxicant , toxin , toxoid , venin , venom , virus , canker , adulterant , adulterator , contaminator , impurity , pollutant , antigen , arsenic , belladonna , botulism , cyanide , hemlock , irritant , pestilence , pollution , ptomaine , salmonella , taint , toxicity , toxine , venenation , virulence

verb

adulterate , corrupt , debase , defile , deprave , destroy , envenom , fester , harm , infect , injure , kill , make ill , murder , pervert , stain , subvert , taint , undermine , vitiate , warp , foul , pollute , canker , arsenic , bacteria , bane , botulin , botulism , cancer , contagion , contaminate , cyanide , debauch , evil , plague , salmonella , toxin , venom , virus

adjective

mephitic , mephitical , toxic , toxicant , venomous , virulent