1. formally charges a public official with misconduct in office
Usage: legal/political
2. calls into question the credibility or validity of something
Usage: formal

Examples

• The House of Representatives impeaches the president for abuse of power.
• Congress rarely impeaches federal judges despite misconduct allegations.
• The lawyer impeaches the witness’s testimony with contradictory evidence.
• New research impeaches the validity of the earlier study.
• The senator’s voting record impeaches his claims about supporting veterans.
• The committee impeaches the official for violating ethics rules.