relating to; regarding; about: a discussion concerning foreign aid.
Origin: 1375–1425; late Middle English; see concern, -ing2
concern
—verb (used with object)
to relate to; be connected with; be of interest or importance to; affect: The water shortage concerns us all.
to interest or engage (used reflexively or in the passive, often followed by with or in ): She concerns herself with every aspect of the business.
to trouble, worry, or disquiet: I am concerned about his health.