rough·en /ˈrʌfən/ verb [intransitiveI, transitiveT] ROUGH/NOT SMOOTHto become rough, or to make something rough (使)变得粗糙,(使)变得不平 hands roughened by work 因为干活而变粗糙的双手
roughen• Her hands had been roughened by years of labouring.• Sand the surface to roughen it before repainting.• the roughened old stump of a tree