'non-legislative' originates from the prefix 'non-' meaning 'not' and the word 'legislative' from Latin 'legislativus', where 'legis' meant 'law' and 'lativus' meant 'pertaining to'.

'legislativus' transformed into the French word 'législatif', and eventually became the modern English word 'legislative'.

Initially, it meant 'pertaining to law', but over time it evolved into its current meaning of 'related to the process of making laws'.