To assert that something is not true.
To disclaim connection with, responsibility for, etc.; to refuse to acknowledge; to disown; to abjure; to disavow.
To refuse to give or grant something to someone.
To disallow or reject.
To take something away from someone; to deprive of.
To prevent from scoring.
To deny the existence, evidence, or truth of; to contradict.
To perform the NOT operation on.
To be negative; bring or cause negative results.
To nullify or cause to be ineffective.