roughenrough•en /'rʌf(ə)n/

vi (声音等)变粗哑；(天气)变糟，起风暴

• His voice roughened. 他的嗓音变粗哑了。

• The weather suddenly roughened when we were on the way home. 我们正在回家的路上，天气突然变坏了。

vt (使)变粗糙，(使)变毛糙

• Father's hands have been roughened by many years of hard work. 父亲的双手因多年的辛苦劳作而变得粗糙。