Definition of asperity noun from the Oxford Advanced Learner's Dictionary

 

asperity

 noun
noun
BrE BrE//æˈsperəti//
 
; NAmE NAmE//æˈsperəti//
 
[uncountable](formal)
 
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the fact of being rough or severe, especially in the way you speak to or treat somebody synonym harshness She pointed out, with some asperity, that it had all been my fault. There was a touch of asperity in his tone. Word Origin Middle English (in the sense ‘hardship, rigour’): from Old French asperite, or Latin asperitas, from asper ‘rough’.
See the Oxford Advanced American Dictionary entry: asperity