'erratic' originates from Latin, specifically the word 'erraticus,' where 'errāre' meant 'to wander.'

'erraticus' transformed into the Old French word 'erratique,' and eventually became the modern English word 'erratic' through Middle English.

Initially, it meant 'wandering or straying,' but over time it evolved into its current meaning of 'unpredictable or inconsistent.'