in AM, use 美国英语用 grueling
- ADJ-GRADED 累垮人的;艰难的;令人筋疲力尽的
A gruelling activity is extremely difficult and tiring to do.
- He had complained of exhaustion after his gruelling schedule over the past week...
完成上周紧张的日程安排后,他抱怨自己累得筋疲力尽。 - This flight was more gruelling than I had expected.
这次飞行比我预想的更累!