'anathematised' originates from Medieval Latin, specifically the word 'anathematizare,' where 'anathema' meant 'a formal curse' and '-izare' meant 'to make or do.'

'anathematizare' transformed into the Late Middle English word 'anathematise,' and eventually became the modern English word 'anathematise,' with 'anathematised' as its past form.

Initially, it meant 'to formally curse or excommunicate,' and this meaning has largely remained the same in modern usage, referring to strong condemnation or excommunication.