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arduous
01
трудный
requiring so much effort, mostly physical, that will cause exhaustion
02
трудный
taxing to the utmost; testing powers of endurance
03
трудный
requiring vigorous effort, particularly on a continuous basis
Пример
The soldiers endured an arduous march through rough terrain.
The climb up the mountain was an arduous task for the hikers.
Building the house from scratch was an arduous undertaking.
Preparing for the marathon proved to be an arduous training routine.
He found the task of moving all the furniture an arduous chore.
