transitive verb

1. to have a relation to or bearing on; deal with
2. to draw in; engage or involve; be a proper affair of that doesn't concern you
3. to cause to feel uneasy or anxious

Etymology: ME concernen < ML concernere, to perceive, have regard to, fig. use of LL concernere, to sift, mix, as in a sieve < L com-, with + cernere, to sift, hence perceive, comprehend: see crisis

noun

1. a matter of interest or importance to one; that which relates to or affects one; affair; matter; business
2. interest in or regard for a person or thing
3. relation; reference
4. worry; anxiety to feel concern over one's health
5. a business establishment; company; firm