1V-ERG (使)变粗糙 If something coarsens or is coarsened, it becomes thicker or rougher in texture. (使)变粗糙 [Also VERB n]
Skin thickens, dries and coarsens after sun exposure. [VERB]
晒后皮肤会变厚、变干、变粗糙。
...his gnarled, coarsened features. [VERB-ed]
他那饱经风霜、粗糙的脸
2V-ERG (使)变粗俗;(使)变粗鲁 If someone's behaviour or speech coarsens or if they coarsen it, they become less polite or they begin to speak in a less pleasant way. (使)变粗俗;(使)变粗鲁
Her voice has deepened and coarsened with the years. [VERB]
随着岁月的流逝,她的声音变得低沉粗鲁起来。
He had coarsened his voice to an approximation of Cockney. [VERB noun]