'concern' originates from Old French, specifically the word 'concerner,' where 'con-' meant 'with' and 'cernere' meant 'to sift or separate.'

'concerner' transformed into the Middle English word 'concernen,' and eventually became the modern English word 'concern.'

Initially, it meant 'to sift or separate with,' but over time it evolved into its current meaning of 'to be involved or worried about something.'