Maintenance (noun)

1. The process of keeping something in good condition by regularly checking and repairing it.
2. The action of preserving and keeping something in its existing state.

Origin:

Late middle english: from old french, from latin mantinere 'preserve, support'.

Examples:

1. The maintenance of the building was a continuous process to ensure it remained in good condition.
2. Regular maintenance of the car is necessary to keep it running smoothly.
3. The maintenance of the garden involved weeding and watering the plants.
4. The company was responsible for the maintenance of the equipment used in the production process.
5. The maintenance of good health is essential for leading a long and happy life.