'blasphemy' originates from Greek, specifically the word 'blasphemia,' where 'blaptein' meant 'to injure' and 'pheme' meant 'reputation.'

'blasphemia' transformed into the Late Latin word 'blasphemia,' and eventually became the modern English word 'blasphemy' through Old French 'blasfemie.'

Initially, it meant 'to speak ill of or slander,' but over time it evolved into its current meaning of 'speaking sacrilegiously about God or sacred things.'