grueling

/ˈɡruːəl/

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very difficult and tiring, needing great effort for a long time 使人筋疲力尽的；折磨人的 SYN punishing
a gruelling journey/schedule
使人筋疲力尽的旅程；累人的日程
I’ve had a gruelling day.
我一天下来累得筋疲力尽。