'erratically-limited' originates from the combination of 'erratic' and 'limited'. 'Erratic' comes from Latin 'erraticus', meaning 'wandering', and 'limited' from Latin 'limitare', meaning 'to bound'.

'Erraticus' transformed into the Old French 'erratique', and eventually became the modern English word 'erratic'. 'Limitare' evolved into the Old French 'limiter', leading to the modern English 'limited'.

Initially, 'erratic' meant 'wandering' and 'limited' meant 'bounded'. Together, they evolved to describe something inconsistently bounded.