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• gruelling - definition of gruelling by the Free Online Dictionary ...

  gru·el·ing also gru·el·ling (gr-l ng, gr l ng) adj. Physically or mentally demanding to the point of exhaustion: a grueling campaign. gru el·ing·ly adv.

• gruelling - Wiktionary

  Definition from Wiktionary, a free dictionary

• gruelling definition | Dictionary.com

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