To contaminate (an object or substance) with a pathogen.
To make somebody enthusiastic about one's own passion, or to communicate a feeling to others, or a feeling communicating itself to others.
To bring (the body or part of it) into contact with a substance that causes illness (a pathogen), so that the pathogen begins to act on the body; (of a pathogen) to come into contact with (a body or body part) and begin to act on it.
To pollute; to cause to become poisonous.
To place false information into (a cache) as part of an exploit.
To cause (someone) to hate or to have unfair negative opinions.
To use poison to kill or paralyse (somebody).
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 ?")