To protect an environment, heritage, etc.
To remain unchanged during a process
To save for later use, sometimes by the use of a preservative.
Wilderness where human development is prohibited.
A jam or thick syrup made from fruit.
To empty or unload, as the vessels of the human system, by bloodletting or by medicine.
To reduce by destroying or consuming the vital powers of; to exhaust, as a country of its strength or resources, a treasury of money, etc.