Unchanged (adjective)

1. Remaining the same; not altered or modified.
2. Not having been affected by any changes.

Origin:

Late middle english: from un- "not" + changed.

Examples:

1. The stock market was unchanged from the previous day.
2. The recipe has remained unchanged for decades.
3. His opinion on the matter is unchanged.
4. The rules of the game remain unchanged.
5. The view from the top of the mountain is unchanged.