Definitions of repudiate:

• verb:   refuse to acknowledge, ratify, or recognize as valid

  Example: "The woman repudiated the divorce settlement"

• verb:   reject as untrue, unfounded, or unjust

  Example: "She repudiated the accusations"

• verb:   refuse to recognize or pay

  Example: "Repudiate a debt"

• verb:   cast off or disown

  Example: "The parents repudiated their son"