repudiate
1. To reject the validity or authority of: “Chaucer . . . not only came to doubt the worth of his extraordinary body of work, but repudiated it” Joyce Carol Oates.
2. To reject emphatically as unfounded, untrue, or unjust: repudiated the accusation.
3. To refuse to recognize or pay: repudiate a debt.
4.
a. To disown (a child, for example).