Simple Definition of grueling

from our Learner's Dictionary

grueling

adjective

variants or British gruelling

ˈgruːwəlɪŋ

: very difficult : requiring great effort

a grueling race

His schedule is grueling.

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“Grueling.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/grueling. Accessed 21 Jun. 2026.

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