Noun | 1. rigourousness - something hard to endure; "the asperity of northern winters"rigor, rigorousness, asperity, grimness, hardship, rigour, severeness, severitydifficultness, 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"inclemency, rigorousness, rigour, rigor, harshness, severeness, severity, stiffness, hardnesssternness, strictness - uncompromising resolution |