gruelling
/ˈgrʊəlɪŋ/( <美> grueling)
adjective
- extremely tiring and demanding精疲力竭的; 折磨人的：
a gruelling schedule.
让人疲于应付的日程表。
派生词
gruellingly
adverb词源
mid 19th cent.: from the verb gruel 'exhaust， punish'， from an old phrase get one's gruel 'receive one's punishment'.