cause for concern

: a reason for an action or condition : motive

: something that brings about an effect or a result

: a person or thing that is the occasion of an action or state

: to serve as a cause or occasion of

: to compel by command, authority, or force

: to relate to : be about

: to bear on

: to have an influence on : involve

: marked interest or regard usually arising through a personal tie or relationship

: an uneasy state of blended interest, uncertainty, and apprehension

: something that relates or belongs to one : affair