'erratically-transmitted' originates from the combination of 'erratic' and 'transmit'. 'Erratic' comes from Latin 'erraticus', meaning 'wandering', and 'transmit' from Latin 'transmittere', meaning 'to send across'.

'Erraticus' transformed into the Old French 'erratique', and eventually became the modern English word 'erratic'. 'Transmittere' evolved into the Middle English 'transmitten', leading to the modern 'transmit'.

Initially, 'erratic' meant 'wandering', but over time it evolved to mean 'unpredictable'. 'Transmit' has largely retained its original meaning of 'to send across'.