Definition of "gruelling" []

• So difficult or taxing as to make one exhausted; backbreaking. (adjective)

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• "Instead of giving their chapters proper titles, these worthy gentlemen simply slap a character’s name at the top of a fresh page, followed by his or her inmost thoughts and experiences in gruelling detail."
• "Like most top chefs, his lifestyle could already be described as gruelling, starting work at 7am and finishing at 11pm after dinner."
• "Multiple call-backs are rare and long "gruelling" auditions even rarer."