To "maintain" means to keep something in good condition or to ensure it continues to function properly. This can apply to various things, such as a car, a garden, or even a relationship. Regular check-ups, cleaning, and repairs are essential to maintain these items, helping them last longer and perform better. In a broader sense, maintaining can also refer to upholding certain standards or practices. For example, a company might maintain its quality by following strict guidelines. Similarly, individuals can maintain their health by eating well and exercising regularly. Overall, maintenance is crucial for longevity and effectiveness in many aspects of life.