'necessitarianism' originates from the Latin word 'necessitas,' meaning 'necessity,' combined with the suffix '-ism' to denote a doctrine or belief.

'Necessitas' transformed into the English word 'necessity,' and eventually became the modern English word 'necessitarianism' through philosophical discourse.

Initially, it meant 'the state of being necessary,' but over time it evolved into its current meaning of 'a doctrine that all events are determined by necessity.'