Preventive (adjective)

1. Intended to prevent or deter something from happening.
2. Taken or done in order to prevent something from happening or developing.

Origin:

From the latin praeventivus, from praevenire ("to preven.t")

Examples:

1. The doctor recommended a preventive measure to reduce the risk of heart disease.
2. The company has implemented preventive measures to reduce the risk of fraud.
3. The preventive measures taken by the city helped to reduce the spread of the virus.
4. The preventive maintenance schedule is designed to keep the equipment in good working order.
5. The preventive measures taken by the school helped to keep the students safe during the pandemic.