Meaning of the word gruelling in English

What does gruelling mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

gruelling

US /ˈɡruː.ə.lɪŋ/
UK /ˈɡruː.ə.lɪŋ/

Adjective

1.

extremely tiring and difficult, and demanding great effort and determination:

Example:
Junior doctors often have to work a gruelling 100-hour week.
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