Sedulous (adjective)

1. Showing dedication and perseverance in one's work or studies.
2. Diligent in one's efforts; persistent in achieving a goal.

Origin:

The word is derived from the latin word "sēdulus" meaning diligent, assiduous, persistent.

Examples:

1. The student's sedulous efforts paid off when she received a full scholarship.
2. She was known for her sedulous work ethic, often staying late to finish projects.
3. His sedulous attention to detail was evident in the precision of his work.
4. Despite the difficulties, she remained sedulous in her pursuit of success.
5. The sedulous worker was rewarded with a promotion for his hard work and dedication.