'confessor' originates from Latin, specifically the word 'confessor', where 'con-' meant 'together' and 'fateri' meant 'to admit'.

'confessor' changed from the Old French word 'confesseur' and eventually became the modern English word 'confessor'.

Initially, it meant 'one who admits or confesses', but over time it evolved into its current meaning of 'a person who confesses faith or hears confessions'.