'baptismal' originates from the Greek word 'baptisma,' where 'baptizein' meant 'to immerse or dip.'

'baptisma' transformed into the Latin word 'baptismus,' and eventually became the modern English word 'baptismal' through Old French 'baptisme.'

Initially, it meant 'to immerse or dip in water,' but over time it evolved into its current meaning of 'relating to baptism.'