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coars‧en
[intransitive and transitive]
[intransitive and transitive]1 to become thicker or rougher, or to make something thicker or rougher : 
Hard work had coarsened his hands.
Hard work had coarsened his hands.2 to become or to make someone become less polite in the way they talk or behave : He's been coarsened by his experience of war.
He's been coarsened by his experience of war.
