chiefproblem

noun
UK /tʃiːf ˈprɒbləm/
US /tʃiːf ˈprɑːbləm/

The chiefproblem is the biggest problem of all.

The chiefproblem with the old bike is that its wheels are broken.


OTHER MEANINGS

2. The most important difficulty that needs to be fixed first.

The chiefproblem at school was the broken gate.

3. The main thing that makes a plan hard to do.

Rain was the chiefproblem for our picnic.

4. The biggest worry for a group of people.

The chiefproblem for the team was having no coach.