Complaint (noun)

1. An expression of dissatisfaction or annoyance about something.
2. An expression of pain or discomfort.
3. A formal accusation or charge.

Origin:

Late middle english: from old french complainte, from latin complere "to fill up" (with expressions of grief).

Examples:

1. He filed a complaint about the service.
2. She had a complaint of a headache.
3. They made a complaint to the manager.
4. The customer had a complaint about the quality of the product.
5. He filed a complaint to the authorities about the injustice.