concerned

the adjective 'concerned' originates from the past participle of the verb 'concern', which entered english in the late middle period from french 'concerner', itself derived from latin 'concernere'. the latin verb is a compound of 'con-' (an intensifier meaning 'altogether') and 'cernere' (meaning 'to sift, distinguish, or perceive'). the core idea was to sift or separate things together, leading to the sense of 'to relate to, to be of importance to'. by the 17th century, the participial form 'concerned' had solidified its adjectival role, describing someone who is mentally 'sifted' or preoccupied with a matter, hence 'worried', or someone to whom a matter 'relates', hence 'involved'.

Structure: con + cern + ed con- (latin origin, meaning 'together, with'), cern (latin root from 'cernere', meaning 'to sift, separate, perceive'), -ed (old english suffix forming past participles and adjectives).