definition of
rigorousness

[1] #1 rigorousness n. [asperity, grimness, hardship, rigor, rigour, severity, severeness, rigourousness] something hard to endure; "the asperity of northern winters". wn

[2] #2 rigorousness n. [severity, severeness, harshness, rigor, rigour, rigourousness, inclemency, hardness, stiffness] excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp". wn