gruellers

/ˈɡruːələrz/
noun
  1. Plural of grueller; multiple people or things that are extremely demanding or tiring.
    • Those math problems were real gruellers; the whole class struggled with them.
    • The final two weeks of boot camp were gruellers that separated the strong from the weak.
    • The team faced a series of gruellers in the playoffs, each game harder than the last.
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