From Cambridge English Dictionary
gruelling
adjective mainly UK (US usually grueling)
UK /??ru?.?.l??/ US /??ru?.?.l??/
extremely tiring and difficult, and demanding great effort and determination:
Junior doctors often have to work a gruelling 100-hour week.
He eventually won the match after five gruelling sets.
Further, Freightman endures a gruelling 3-4 hour work week.
Oh, past the half way mark.
Bookmarks