'indivisibility' originates from Medieval Latin, specifically the word 'indivisibilitas,' where 'in-' meant 'not' and 'divisibilis' meant 'divisible.'

'indivisibilitas' transformed into the Late Middle English word 'indivisibilite,' and eventually became the modern English word 'indivisibility.'

Initially, it meant 'the state of not being able to be divided,' and this meaning has remained the same in modern usage.