roughen /ˈrʌfən/ TEM8 ( roughening, roughened, roughens )

• 1. 

  V-T If something has been roughened, its surface has become less smooth. 使···变粗糙 [usu passive]

  例：

  ...complexions that have been roughened by long periods in the hot sun.

  ...经长时间日晒变粗糙了的面容。