艰巨 (jiān jù): (ofงาน

To complete the entire project within three months is a very arduous task, but the team decided to accept the challenge.

The doctors faced an arduous task: treating all the wounded without equipment and medicine.

For recent college graduates, finding an ideal job is an arduous thing.

Climbing this steep mountain is extremely arduous; the team members must help each other to reach the summit.

Repairing the bridge damaged in the earthquake is an arduous project that requires a lot of manpower and time.