English主要词典
coarsen
Universal Words
verb
1 to become or make sth become thicker and/or rougher:
[V] Her hair gradually coarsened as she grew older. * [VN] His features had been coarsened by the weather.
2 to become or make sb become less polite and often offensive in the way they behave:
[VN] The six long years in prison had coarsened him. [also V]