impeached; impeaching; impeaches
1 : to charge with a crime or misdemeanor specifically : to charge (a public official) before a competent tribunal with misconduct in office After Andrew Johnson, the first president to be impeached, finished his chaotic and disgraceful administration, Grant was the inevitable successor. — Richard Brookhiser
2 : to cast doubt on especially : to challenge the credibility or validity of impeach the testimony of a witness The Husby’s credit rating was impeached because IRS managers were unable to stop the … computer from generating false information. — David Burnham A basic rule of evidence permits any witness to be impeached by establishing that she made a prior statement inconsistent with the current testimony. — Jack H. Friedenthal et al.