'disappointment' originates from Middle French, specifically the word 'desappointer,' where 'des-' meant 'not' and 'appointer' meant 'to appoint.'

'desappointer' transformed into the English word 'disappoint,' and eventually became the modern English word 'disappointment' through Middle English.

Initially, it meant 'to remove from office or position,' but over time it evolved into its current meaning of 'feeling of dissatisfaction.'