roughen
v. 弄粗弄崎岖不平
过去式：roughened 过去分词：roughened 现在分词：roughening 第三人称单数：roughens
近义词：coarsen，toughen，scratch，abrade，rough，crumple，smooth，
英英释义
Verb
- make rough or rougher;
"roughen the surfaces so they will stick to each other"
例句
- Roughen the surface before applying the paint.先把表面弄毛糙再涂颜料。