'concern' originates from Latin, specifically the word 'concernere,' where 'con-' meant 'together' and 'cernere' meant 'to sift or separate.'

'concernere' transformed into the Old French word 'concerner,' and eventually became the modern English word 'concern' through Middle English.

Initially, it meant 'to sift or separate together,' but over time it evolved into its current meanings of 'worry' and 'relate to.'