From Longman Dictionary of Contemporary Englishasperityas‧per‧i‧ty /æˈsperəti, ə-/ noun [uncountable] formal if you speak with asperity, you say something in a way that is rough or severe, showing that you are feeling impatient
Examples from the Corpus
asperity• His words were not heard but the hissing of the voice carried a certain asperity.• And he had a notorious asperity for which he was afterwards sometimes penitent.• With any other man Dalgliesh would have pointed this out and with some asperity.Origin asperity (1200-1300) Old French aspreté, from aspre “rough” 