chiefconcern

noun
UK /tʃiːf kənˈsɜːn/
US /tʃiːf kənˈsɝːn/

The most important thing you care about.

Safety is our chief concern when we build playgrounds.


OTHER MEANINGS

2. The person in charge of a group or project.

The chief concern of the team was to finish the bridge on time.

3. The main problem that needs to be fixed.

The chief concern with the old car is its broken engine.

4. The thing that matters most in a situation.

For the doctor, the chief concern was the patient's fever.