(intransitive) To move downwards, to fall, to drop.
(intransitive) To become weaker or worse.
(transitive) To bend downward; to bring down; to depress; to cause to bend, or fall.
(transitive) To cause to decrease or diminish.
To turn or bend aside; to deviate; to stray; to withdraw.
(transitive) To refuse, forbear.
(transitive, grammar, usually of substantives, adjectives and pronouns) To inflect for case, number and sometimes gender.
(by extension) To run through from first to last; to repeat like a schoolboy declining a noun.
(American football, Canadian football) 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.