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|Noun||1.||rigourousness - something hard to endure; "the asperity of northern winters"|
difficultness, difficulty - the quality of being difficult; "they agreed about the difficulty of the climb"
sternness - the quality (as of scenery) being grim and gloomy and forbidding; "the sternness of his surroundings made him uncomfortable"
|2.||rigourousness - excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp"|