'accurse' originates from Middle English, specifically the word 'acursen,' where 'a-' was an intensifying prefix and 'cursen' meant 'to curse.'

'acursen' transformed into the modern English word 'accurse' through the influence of Old English 'ā-' and 'cursian.'

Initially, it meant 'to curse intensely,' and this meaning has largely remained the same in modern usage.