'misinform' originates from Middle English, specifically the word 'misinforme,' where 'mis-' meant 'wrongly' and 'informe' meant 'to inform.'

'misinforme' transformed into the modern English word 'misinform' through the influence of Old French 'mesinformer.'

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