'adventism' originates from the Latin word 'adventus,' meaning 'coming' or 'arrival,' combined with the suffix '-ism' to denote a belief or movement.

'adventus' transformed into the English word 'advent,' and eventually became 'adventism' to describe the religious movement.

Initially, it referred to the 'coming' of Christ, but over time it evolved into its current meaning of a religious movement focused on this event.