'swallower' originates from Old English, specifically the word 'swelgan', where 'swelgan' meant 'to swallow'.

'swelgan' changed from Old English word 'swelgan' and eventually became the modern English word 'swallow'.

Initially, it meant 'to take in through the mouth and esophagus', but over time it evolved into its current meaning of 'a person or thing that swallows'.