strenuous

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• 15. februar 2013 fra wordnet.princeton.edu

  strenuous — tillægsord — engelsk

  characterized by or performed with much energy or force; "strenuous exercise"

• 31. marts 2016 fra wordnet.princeton.edu

  strenuous — tillægsord — engelsk

  taxing to the utmost; testing powers of endurance; "his final, straining burst of speed"; "a strenuous task"; "your willingness after these six arduous days to remain here"- F.D.Roosevelt