Health (noun)

1. The state of being free from physical or mental disease or pain.
2. The overall condition of an organism at a given time.

Origin:

Middle english helthe, from old english hǣlþ; akin to old high german heilida health, latin salus safety.

Examples:

1. She's been feeling better since she started taking care of her health.
2. He's in good health for his age.
3. The health of the economy is improving.
4. She's concerned about the health of the planet.
5. The health department is responsible for inspecting restaurants.
6. He goes to the gym to maintain his health.