1. to cause something or someone to lose credibility, authority, or legal standing; to undermine the legitimacy of
Usage: chiefly British spelling (American: delegitimize); transitive verb

Examples

• The scandal served to delegitimise the government in the eyes of voters.
• Critics argued that the new policy would delegitimise the institution's independence.
• Spreading false information can delegitimise even well-founded scientific research.
• The opposition party sought to delegitimise their rivals' claims during the debate.
• Corruption allegations delegitimised the leadership's authority.
• Some feared the decision would delegitimise the entire legal process.