To speak ill of; to depreciate; to malign; to revile
To make bad or worse; to vitiate; to corrupt
To cause (someone) to hate or to have unfair negative opinions.
To place false information into (a cache) as part of an exploit.
To use poison to kill or paralyse (somebody).
To pollute; to cause to become poisonous.
To cause to become much worse.
To inhibit the catalytic activity of.
A substance that is harmful or lethal to a living organism when ingested.
Any substance that inhibits catalytic activity.
Something that harms a person or thing.
An intoxicating drink; a liquor. (note: this sense is chiefly encountered in the phrases "name your poison" and "what's your poison ?")