'pantheism' originates from Greek, specifically the word 'pantheios,' where 'pan-' meant 'all' and 'theos' meant 'god.'

'pantheios' transformed into the French word 'panthéisme,' and eventually became the modern English word 'pantheism' through Middle English.

Initially, it meant 'belief in all gods,' but over time it evolved into its current meaning of 'belief that God is identical with the universe.'