'revocable' originates from Latin, specifically the word 'revocabilis,' where 're-' meant 'back' and 'vocare' meant 'to call.'

'revocabilis' transformed into the Old French word 'revocable,' and eventually became the modern English word 'revocable.'

Initially, it meant 'able to be called back,' but over time it evolved into its current meaning of 'capable of being revoked or annulled.'