'revocability' originates from Medieval Latin, specifically the word 'revocabilis,' where 're-' meant 'back' and 'vocare' meant 'to call.' The suffix '-ity' forms a noun indicating a state or condition.

'revocabilis' transformed into the English word 'revocable,' and with the addition of the suffix '-ity,' it eventually became the modern English word 'revocability.'

Initially, it meant 'the quality of being able to be called back or revoked,' and this meaning has remained consistent in modern usage as 'the quality of being able to be revoked.'