grueling

形容词 grueling:

1. characterized by toilsome effort to the point of exhaustion; especially physical effort
   同义词：arduous, backbreaking, gruelling, hard, heavy, laborious, operose, punishing, toilsome

1. My parents like eating gruel.
   我父母喜欢吃稀粥。
2. Gruel is convenient to make in the morning for breakfast.
   吃早饭时，做稀粥是很方便的。

grueling 也作 gru.el.ling

adj.（形容词）
Physically or mentally demanding to the point of exhaustion:
折磨的，使精疲力尽的：对生理或心理上的要求达到极限的：
例句：
a grueling campaign.
令人精疲力尽的比赛

【引伸】
gru.elingly
adv.（副词）