'overeater' originates from the English prefix 'over-' meaning 'excessive' and the word 'eat,' which comes from Old English 'etan,' meaning 'to consume food.'

'etan' transformed into the Middle English word 'eten,' and eventually became the modern English word 'eat.'

Initially, it meant 'to consume food,' but over time it evolved into its current meaning of 'to consume food excessively.'