'anarch' originates from Medieval Latin, specifically the word 'anarchus,' where 'an-' meant 'without' and 'archos' meant 'ruler.'

'anarchus' transformed into the French word 'anarque,' and eventually became the modern English word 'anarch.'

Initially, it meant 'one without a ruler' or 'one who rejects authority,' but over time it evolved into its current meaning of 'a person who promotes or believes in anarchy.'