As a noun, concern is a feeling of worry or interest about something important. As a verb, to concern someone means to affect them or make them feel worried or involved.
From Latin 'concernere', 'to sift together, mix up', via Old French 'concerner' meaning 'to relate to, be of importance'. The emotional sense grew from the idea of something being relevant or touching you personally.
Something 'concerns' you when it feels like it touches your circle of life, not just the distant world. Turning vague worry into specific, named concerns is often the first step in actually solving problems.
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