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Definition of toughness:

  1. The quality or state of being tough.


rigor, gruffness, strictness, pettishness, pique, huskiness, resolve, purpose, ruggedness, biliousness, temper, humor, peevishness, formidability, irritability, stamina, irritation, stringency, will, hoarseness, certain, humour, resoluteness, snappishness, staying power, easy, rigorousness, surliness, willpower, austerity, purposefulness, mood, decidedness, strong, decision, sternness.

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