1. a person who disavows or denies responsibility for, knowledge of, or association with something

Examples

• The company's disavower of the leaked documents claimed they were fabricated.
• He was a disavower of his earlier political statements.
• The disavower refused to accept any connection to the scandal.
• She became a disavower of the movement after learning its true goals.
• The disavower's denial only strengthened public suspicion.