'erratically' originates from Latin, specifically the word 'erraticus,' where 'err-' meant 'to wander.' 'Developed' comes from Old French 'desveloper,' meaning 'to unwrap or unfold.'

'erraticus' transformed into the Middle English word 'erratik,' and eventually became the modern English word 'erratic.' 'Desveloper' evolved into the modern English 'develop.'

Initially, 'erraticus' meant 'wandering,' but over time it evolved into its current meaning of 'unpredictable.' 'Desveloper' meant 'to unwrap,' evolving into 'to grow or expand.'