Gruelingly

The marathon runner finished the race gruelingly.

The gruelingly high standards set by her coach pushed her to perform her best.

The gruelingly difficult exam was a real test of our knowledge.

The musicians practiced gruelingly for hours every day before the big concert.

The chefs cooked gruelingly in the hot kitchen for hours.

The students worked gruelingly on their final projects for weeks.

The construction workers toiled gruelingly under the scorching sun.

He gruelingly completed the marathon, crossing the finish line hours after the other runners.

The researchers studied gruelingly for years to discover a new vaccine.

The teacher gruelingly graded the stack of papers.

The builders gruelingly erected the skyscraper.

They gruelingly worked on the construction project all weekend.