Below are possible answers for the crossword clue Requiring great exertion.
9 letter answer(s) to requiring great exertion
STRENUOUS
characterized by or performed with much energy or force; "strenuous exercise"
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
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