'reprovingly' originates from the verb 'reprove', which comes from the Latin word 'reprobare', where 're-' meant 'again' and 'probare' meant 'to test or prove'.

'reprobare' transformed into the Old French word 'reprover', and eventually became the modern English word 'reprove' through Middle English.

Initially, it meant 'to test again', but over time it evolved into its current meaning of 'to express disapproval'.