To disavow means to deny any connection with something or to refuse to accept responsibility for it. When you disavow something, you're publicly saying “that's not mine” or “I had nothing to do with that.”

Politicians sometimes disavow controversial statements made by their supporters, making it clear they don't agree with or support those views. A company might disavow a product that turned out to be defective, officially distancing itself from the problem. If someone starts a rumor that you said something mean about a friend, you would disavow the rumor by firmly stating you never said it and don't believe it.

The word carries a sense of formal rejection or denial. It's stronger than simply disagreeing. When you disavow something, you're actively pushing it away and making sure everyone knows you want nothing to do with it.

Disavowal is the noun form. Someone's disavowal of a conspiracy theory means they've clearly stated they don't believe it or support it. The word helps us understand how people and organizations create boundaries around what they will and won't stand for.