coarsened
v.
（使）变粗糙( coarsen的过去式和过去分词 );
例句:
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Her voice has deepened and coarsened with the years.
她的声音随着岁月流逝变得低沉而沙哑。
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He had coarsened his voice to an approximation of Cockney.
他让自己的口音变得粗俗起来，接近伦敦东区的发音。
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Her hair gradually coarsened as she grew older.
随着年龄的增长，她的头发逐渐变粗糙了。
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It has thereby coarsened public culture.
来自THETIMES