Remedy (noun)

1. A medicine or treatment for a disease or injury.
2. A means of correcting an evil or defect.
3. Legal action to redress a wrong or seek a remedy for a grievance.

Origin:

Middle english: from old french remedie, from latin remedium "healing, cure", from re- (expressing intensive force) + mederi "heal".

Examples:

1. This remedy will help to reduce the pain.
2. The government is looking for a remedy for the housing crisis.
3. He sought a remedy in the courts for his grievances.
4. The company is looking for a remedy to the financial problem.
5. The remedy for the common cold is rest and fluids.