asperity
/əˈspɛɹɪti//əˈspɛɹɪɾi/
noun
- 1
Roughness as of stone or weather.
“the asperity of Maine's winter”
- 2
Harshness, as of temper.
- 3
Something that is harsh and difficult to endure.
- 4
A part of a geological fault line that does not move.
“Earthquakes begin and end at asperities.”
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