Undiminished (adjective)

1. Not reduced or lessened in any way.
2. Not decreased or weakened.

Origin:

Late 16th century: from un-1 + diminished.

Examples:

1. His determination was undiminished by the setback.
2. Her enthusiasm for the project was undiminished.
3. His love for her was undiminished by the years.
4. Their commitment to the cause was undiminished by the challenges.
5. Their ability to persevere was undiminished by the obstacles.