Unspoiled (adjective)

1. Not damaged, altered or impaired.
2. Not corrupted or contaminated.
3. Not ruined or spoiled.

Origin:

From the middle english word 'unspoild' meaning 'not spoiled or ruined'.

Examples:

1. The mountain lake remained unspoiled by pollution.
2. The ancient ruins were unspoiled by modern development.
3. The child remained unspoiled despite growing up in a wealthy family.
4. The film was unspoiled by special effects and relied solely on its storytelling.
5. The beauty of the forest was unspoiled by human intervention.