very difficult po angielsku:

arduous journey/task

The first part of this book is the story of my own arduous journey of learning how to trust what I knew and what I did not know about healing.

All three of them had put in an arduous day.

Let us hope that the arduous process of ratifying this Treaty has finally come to an end.

After hours of arduous climbing, he finally reached the top of the mountain.

That was the years of arduous work in the mine.

His successors will face the arduous task of fleshing out the content of this “pivot.”

This is an arduous task!