coars·en /ˈkɔːsən $ ˈkɔːr-/ verb [intransitiveI, transitiveT] 1 ROUGH/NOT SMOOTHto become thicker or rougher, or to make something thicker or rougher (使)变厚;(使)变粗,(使)粗糙 Hard work had coarsened his hands. 干粗活使他的手变得粗糙。
2 RUDE/OBSCENEto become or to make someone become less polite in the way they talk or behave (使)变粗鲁;(使)变粗俗;(使)变猥亵 He’s been coarsened by his experience of war. 战争的经历使他变得粗鲁了。
coarsen• The political process has become coarsened.