cause

(countable, often with of, typically of adverse results) The source of, or reason for, an event or action; that which produces or effects a result.

(uncountable, especially with for and a bare noun) Sufficient reason for a state, as of emotion.

(countable) A goal, aim or principle, especially one which transcends purely selfish ends.

(obsolete) Sake; interest; advantage.

(countable, obsolete) Any subject of discussion or debate; a matter; an affair.

(countable, law) A suit or action in court; any legal process by which a party endeavors to obtain his claim, or what he regards as his right; case; ground of action.