the.com/concern

means To concern is to feel troubled interest in something, or to be the business or responsibility of someone — the thing that involves or affects you enough to care.

from From Old French 'concerner', from Medieval Latin 'concernere' — literally 'to sift together,' built from 'com-' (together) and 'cernere' (to sift, distinguish, perceive — the same root that gives us 'discern' and 'certain'). The sense evolved from 'to relate to' or 'have to do with' into the worry-flavored meaning we use today, as things that pertained to you became things that preoccupied you.