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grueling▼◼◼◼adjective[UK: ˈɡruːəl.ɪŋ] [US: ˈɡruːəl.ɪŋ]
gruelling▼adjective[UK: ˈɡruːəl.ɪŋ] [US: ˈɡruːəl.ɪŋ]
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