disavower
/ˌdɪsəˈvoʊər/Definitions
1. noun
One that disavows something; a person who formally rejects or denies a claim, obligation, or responsibility.
“The disavower of the contract was sued for refusing to honor its terms.”
2. verb
To formally reject or deny a claim, obligation, or responsibility.
“The company’s management was accused of disavowing their earlier statements about the product’s safety.”