gruelling

very difficult and tiring, needing great effort for a long time ทำให้เหนื่อย

Novak, who had a gruelling five-set semi-final win over Andy Murray, came into the final with a day less rest than Rafa.

The soldiers went through a gruelling selection process for the voyage.

These factory workers are now able to return to their hometowns and find new jobs that are less gruelling than working in a factory full of toxic pollutants.