1. past tense and past participle of delegitimate; to undermine or remove the legitimacy, authority, or credibility of someone or something
Usage: formal; often used in political, social, or institutional contexts

Examples

• The scandal delegitimated the organization's leadership in the eyes of the public.
• Critics argued that the decision delegitimated the court's independence.
• Repeated failures delegitimated the government's claims about economic competence.
• The leaked documents delegitimated the company's environmental certifications.
• His controversial statements delegitimated his position as a trusted advisor.
• The investigation delegitimated the previous administration's policies.