repudiate

(verb) cast off. Synonyms: disown, renounce. Examples: "She renounced her husband." "The parents repudiated their son."

(verb) refuse to acknowledge, ratify, or recognize as valid. Example: "The woman repudiated the divorce settlement."

(verb) refuse to recognize or pay. Example: "Repudiate a debt."

(verb) reject as untrue, unfounded, or unjust. Example: "She repudiated the accusations."