'engross' originates from Old French, specifically the word 'engrosser,' where 'en-' meant 'in' and 'gros' meant 'large or thick.'

'engrosser' transformed into the Middle English word 'engrossen,' and eventually became the modern English word 'engross.'

Initially, it meant 'to write in large letters or to monopolize,' but over time it evolved into its current meaning of 'to absorb one's attention completely.'