asperity
as-per-i-ty
noun
Harshness or sharpness of tone, manner, or temper.
"Her asperity surprised everyone present."
noun
Roughness or unevenness of a surface or conditions.
"The asperity of the terrain made walking difficult."
Thesaurus
Synonyms: rigourousness, rigour, hardship, severity, rigor, severeness, grimness, rigorousness, sharpness