to refuse to accept something or someone as true, good, or reasonable (Cambridge)
to refuse to accept something (Oxford)
I utterly repudiate those remarks (Cambridge)
Socialism had been repudiated at the polls. (Oxford)
He repudiated his first wife and married her sister. (Oxford)
Repudiate a contract/agreement
Repudiate something
Repudiate somebody
Deny
Reject
Disown
Embrace
Acknowledge
Repudiation
Repudiatory