'pilferer' originates from Old French, specifically the word 'pelfrer,' where 'pelfre' meant 'booty or spoils.'

'pelfrer' transformed into the Middle English word 'pilfre,' and eventually became the modern English word 'pilferer.'

Initially, it meant 'to steal or plunder,' but over time it evolved into its current meaning of 'a person who steals small items.'