1.变粗糙；使粗糙to become rough; to make sth rough
His voice roughened with every word.他说话的声音越来越嘶哑。
Cold weather roughens your skin.天气寒冷，皮肤变得粗糙。
Before painting the wood, roughen the surface with sandpaper.
油漆木器前，先用砂低把表面磨毛糙。
Currently, using photo-enhance chemical etching (PEC) has been proven to be an efficient method to roughen then-type GaN surface.
现在，光辅助化学湿蚀刻法（photo-enhancechemicalwetetchingmethod）已被证实可以有效的粗化N型氮化镓表面，且会形成规则的六面体形状。
Roughen the surface before applying the paint.
先把表面弄毛糙再涂颜料。
These ingredients can cause bleeding under the nails, discolouration and can roughen the smooth texture of the nails.
这些成分可引起指甲下出血，变色，甚至使原本质地光滑的指甲变得粗糙。
If maximum recoat interval is exceeded, roughen the film surface to ensure the adhesion between layers.
如超过最大重涂间隔，须磨粗表面，以确保漆膜间的附着力。
If gas permeates the polymer, it can roughen the inner surface of the part when the gas migrates out again.
如果气体穿透到聚合物内，当气体再溜出去的时候会造成内表面粗糙。
To cause (the skin) to roughen, redden, or crack, especially as a result of cold or exposure
使（皮肤）变粗糙、变红或皲裂，尤指寒冷或暴露所致
to irritate or roughen by rubbing
通过摩擦使变粗糙或激怒
My beard a roughen in' coal pile
我的胡子长得像煤堆
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