To become weaker or worse.
To choose not to do something; refuse, forbear, refrain.
To run through from first to last; to recite in order as though declining a noun.
To cause to decrease or diminish.
To bend downward; to bring down; to depress; to cause to bend, or fall.
To turn or bend aside; to deviate; to stray; to withdraw.
To move downwards, to fall, to drop.
To inflect for case, number, gender, and the like.
To reject a penalty against the opposing team, usually because the result of accepting it would benefit the non-penalized team less than the preceding play.
To recite all the different declined forms of (a word).
A weakening.
Downward movement, fall.
A reduction or diminution of activity.
The act of declining or refusing something.
A sloping downward, e.g. of a hill or road.
To cause to become much worse.
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 pollute; to cause to become poisonous.
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 ?")