'disavowal' originates from Old French, specifically the word 'desavouer,' where 'des-' meant 'apart' and 'avouer' meant 'to acknowledge.'

'desavouer' transformed into the Middle English word 'disavowen,' and eventually became the modern English word 'disavowal.'

Initially, it meant 'to refuse to acknowledge,' but over time it evolved into its current meaning of 'denying responsibility or support.'