An assertion of untruth.
A disownment or disavowal
Refusal to believe that a problem exists.
A defense mechanism involving a refusal to accept the truth of a phenomenon or prospect.
Refusal to admit responsibility for wrongdoing.
A refusal or failure to provide or grant something that is requested or desired.
Negationism, denialism of historical facts or accepted interpretation.
The negation in logic.
An act of self-denial.
The denial or invalidation of one's own needs, interests, etc. for the sake of another's; the setting aside of self-interest.