'discloser' originates from Middle English, specifically the word 'disclosen,' where 'dis-' meant 'apart' and 'closen' meant 'to close.'

'disclosen' transformed into the modern English word 'disclose,' and eventually became 'discloser' as a noun form.

Initially, it meant 'to open or uncover,' but over time it evolved into its current meaning of 'to reveal information.'