chiefpart
nounUK /ˈtʃiːf pɑːt/
US /ˈtʃiːf pɑːrt/
The chiefpart is the biggest or most important part of something.
The engine is the chiefpart of a car.
OTHER MEANINGS
2. The largest share or portion of a whole.
The chiefpart of the money went to the new school.
3. The most important element or section of a document or plan.
The chiefpart of the report explains the new rules.
4. The leading or principal role in an activity.
She played the chiefpart in organizing the event.