'affectibility' originates from Latin, specifically the word 'affectibilitas,' where 'affect-' meant 'to influence' and '-ibilitas' meant 'ability or capacity.'

'affectibilitas' transformed into the French word 'affectibilité,' and eventually became the modern English word 'affectibility' through Middle English.

Initially, it meant 'the ability to be influenced,' and this meaning has largely remained the same in modern usage.