Delegitimize
Delegitimisation (also spelled delegitimation) is the withdrawal of legitimacy, usually from some institution such as a state, cultural practice, etc. which may have acquired it explicitly or implicitly, by statute or accepted practice. It is a sociopsychological process which undermines or marginalises an entity by presenting facts and/or value judgments e construed to withdraw legitimacy and can in some cases be a self-justifying mechanism, with the ultimate goal of justifying harm of an outgroup.The concept applies to a wide spectrum of social contexts ranging from disputes about political entities to chronic illnesses.
Illegitimize (verb)
To make illegitimate.
Delegitimize (verb)
To make something less legitimate.
Delegitimize (verb)
To make something illegal that was previously legal.