Use 'disclaim' when you want to clearly distance yourself from responsibility or involvement in an event. After the scandal, the CEO quickly disclaimed any involvement in the fraudulent activities.
Pro Tip 2/3
Public Denial
When someone 'disclaims' something, it's usually a public and formal announcement. The politician disclaimed the accusations in a press conference.
Pro Tip 3/3
Strong Denouncement
The word 'disclaim' is strong and often used when someone is emphatic about not being associated with something. She disclaimed any knowledge of the crime.