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arduous
01
骨の折れる, 困難な
requiring so much effort, mostly physical, that will cause exhaustion
Example
The climb up the mountain was an arduous task for the hikers.
Preparing for the marathon proved to be an arduous training routine.
02
骨の折れる, 困難な
requiring a lot of mental effort and hard work
Example
Writing a novel can be an arduous process, requiring long hours of focused concentration and creativity.
Building a successful business from the ground up is an arduous endeavor that involves overcoming numerous obstacles and setbacks.
