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

'anathematizare' transformed into the French word 'anathématiser,' and eventually became the modern English word 'anathemize' through Middle English.

Initially, it meant 'to formally curse or excommunicate,' and this meaning has largely remained the same in modern usage, though it can also mean to strongly denounce.