'non-interventionist' originates from the prefix 'non-' meaning 'not' and the word 'interventionist,' which comes from 'intervene,' derived from Latin 'intervenire,' where 'inter-' meant 'between' and 'venire' meant 'to come.'

'intervenire' transformed into the French word 'intervenir,' and eventually became the modern English word 'intervene,' leading to 'interventionist' and subsequently 'non-interventionist.'

Initially, 'intervene' meant 'to come between,' but over time, 'interventionist' evolved to mean actively involving oneself in affairs, and 'non-interventionist' as the opposite.