Preserve (verb)

1. To keep safe from harm, decay, loss, or destruction.
2. To keep (something) intact or unchanged.
3. To maintain the original condition or appearance of (something) by protecting or preserving it.
4. To keep food fresh by treating it with sugar, vinegar, or other substances.
5. To maintain (a natural area or species) in a state of unspoiled nature by protecting it from commercial or industrial development.

Origin:

Middle english preservien, from anglo-french preserver, from latin praeservare, from prae- + servare to keep.

Examples:

1. She carefully preserved the delicate flowers in a book.
2. The museum aims to preserve the artifacts for future generations.
3. The conservation efforts have helped to preserve the rainforest.
4. She preserved the peaches in jars for the winter.
5. The national park is a preserve for wildlife and natural beauty.