noun
gravamen
grah-VAY-mun/ɡrɑvˈeɪmʌn/
The essential grievance or main point of a complaint.
The broken stair is the gravamen of the complaint, outweighing the unrelated documents.

Etymology
The Latin noun literally meant a burden and came to mean a grievance. In law, it identifies the part of an accusation that weighs most heavily against the accused.
In context
the essential heart of the case the gravamen of the case as they say in the law we know exactly what happened here
More examples
- The judge asks the attorney to identify the gravamen of the lawsuit.
- Unequal treatment, not low wages, forms the gravamen of their complaint.
- His response addresses minor details but ignores the gravamen of my complaint.
Forms
gravamen · gravamina · gravamens