'worsenable' originates from the English word 'worsen,' which is derived from the Old English word 'worsian,' where 'wors-' meant 'worse.'

'worsian' transformed into the Middle English word 'worsen,' and eventually became the modern English word 'worsenable.'

Initially, it meant 'to become worse,' but over time it evolved into its current meaning of 'capable of being worsened.'